Misc
Brass Rods: The Sustainable Choice
The following content is sponsored by the Copper Development Association
Brass Rods: The Sustainable Choice
Brass rods have a powerful lineup of green attributes, making them the sustainable choice for manufacturers and end-users of precision machined and forged parts.
This infographic, from the Copper Development Association, shows how brass rods can reduce emissions in machine shops, be recycled without losing properties, and contribute to a cleaner environment.
The Brass Rod Circular Economy
The metallurgical properties of brass allow pre- and post-consumer sources of brass scrap to be recycled with no loss in properties.
Brass scrap can retain over 90% of the original material value. In addition, brass doesn’t need energy-intensive processing, unlike steel and aluminum, which must be smelted and refined before being recycled into new products.
As a result, there is a greater chance that steel and aluminum scrap will end up in landfills.
Most brass-rod alloys produced in North America contain 95% or higher recycled content.
Closed-loop recycling of brass keeps this valuable engineering material out of landfills, reducing the need for new mines and all the environmental impacts that entails.
Higher Machinability Leads to Lower Operational Carbon Emissions
Machinability is how easily a material can be worked using cutting processes. It directly impacts the amount of energy required to produce finished parts.
With typical machine shops producing millions of parts each year, the carbon impact can be significant.
Here’s how brass and steel compare when manufacturing complex parts using computer numerical control (CNC) machining.
| Material | Brass | Steel |
|---|---|---|
| Type | Free-cutting brass (C36000) | Free-cutting steel (12L14) |
| Maximum machinability rating (0-100) | 100 | 21 |
| Metal Removal Rate (cubic inches per minute) | 0.238 | 0.114 |
| Time to remove material (hours) | 161,111 | 336,111 |
| Energy required to produce parts (kilowatt-hour) | 9,475 | 18,931 |
In this example, using brass represented a savings of 3,510 kg in carbon dioxide (CO2).
The significantly longer tool life enabled by brass also reduces the need for new cutting tools, further decreasing emissions.
High recycled content and exceptional machinability make brass rods the sustainable choice for manufacturers and end-users seeking to reduce their environmental footprint and support the transition to a low-carbon future.
Explore the advantages of brass rod solutions.
Misc
Charted: The End-of-Life Recycling Rates of Select Metals
End-of-life recycling rates measure the percentage of a material that is recovered at the end of its useful life, rather than being disposed of or incinerated.
Charted: The End-of-Life Recycling Rates of Select Metals
This was originally posted on our Voronoi app. Download the app for free on Apple or Android and discover incredible data-driven charts from a variety of trusted sources.
We visualize the end-of-life recycling rates (EOL-RR) of commonly used metals in the economy. Data is sourced from the International Energy Agency, last updated in 2021.
Tracking recycling rates helps manage resources better and make smarter policies, guiding efforts to cut down on waste.
Ranked: The End of Life Recycling Rates of Select Metals
Gold has an 86% recycling rate according to the latest available data. Per the Boston Consulting Group, one-third of total gold supply was met through recycling between 1995–2014.
| Metal | End-of-life recycling rate (2021) | 🔍 Used In |
|---|---|---|
| Gold | 86% | 💍 Jewelry / Electronics |
| Platinum/Palladium | 60% | 🔬 Optical fibers / Dental fillings |
| Nickel | 60% | 🔋 Batteries / Turbine blades |
| Silver | 50% | 💍 Jewelry / Mirrors |
| Copper | 46% | 🔌 Electrical wiring / Industrial equipment |
| Aluminum | 42% | ✈️ Aeroplane parts / Cans |
| Chromium | 34% | 🍽️ Stainless steel / Leather tanning |
| Zinc | 33% | 🔗 Galvanizing metal / Making rubber |
| Cobalt | 32% | 🔋 Batteries / Turbine engines |
| Lithium | 0.5% | 🔋 Batteries / Pacemakers |
| REEs | 0.2% | 📱 Mobile phones / Hard drives |
Note: Figures are rounded.
Several factors can influence metal recycling rates. According to this International Resource Panel report, metals that are used in large quantities (steel) or have a high value (gold) tend to have higher recycling rates.
However, for materials used in small quantities in complex products (rare earth elements in electronics), recycling becomes far more challenging.
Finally, a metal’s EOL-RR is strongly influenced by the least efficient link in the recycling chain, which is typically how it’s initially collected.
Learn More on the Voronoi App 
If you enjoyed this post, check out Critical Materials: Where China, the EU, and the U.S. Overlap which shows how critical materials are classified within different jurisdictions.
Misc
Companies with the Most Fossil Fuel and Cement CO2 Emissions
Half of the world’s total fossil fuel and cement carbon dioxide emissions in 2023 came from just 36 companies.
Companies with the Most Fossil Fuel and Cement CO2 Emissions
This was originally posted on our Voronoi app. Download the app for free on iOS or Android and discover incredible data-driven charts from a variety of trusted sources.
Key Takeaways
- Half of the world’s fossil fuel and cement carbon dioxide emissions in 2023 came from just 36 entities, according to a report by the Carbon Majors Project
- If Saudi Aramco were a country, it would be the fourth-largest polluter in the world, after China, the U.S., and India.
- Five publicly traded oil companies—ExxonMobil, Chevron, Shell, TotalEnergies, and BP—together accounted for 5% of global carbon dioxide emissions from fossil fuels.
Chinese Companies Dominate the List
This graphic is based on Carbon Majors, a database of historical production data from 180 of the world’s largest oil, gas, coal, and cement producers representing 169 active and 11 inactive entities.
In 2023, the top 20 highest carbon-producing entities were responsible for 17.5 gigatonnes of carbon dioxide equivalent (GtCO₂e) in emissions, accounting for 40.8% of global fossil fuel and cement CO₂ emissions. The list is largely dominated by state-owned companies, with 16 of the top 20 being state-controlled. Notably, eight Chinese entities contributed to 17.3% of global fossil fuel and cement CO₂ emissions in 2023.
| Entity | Total emissions (MtCO2e) | Global CO2 emissions (%) |
|---|---|---|
| 1 | Saudi Aramco | 4.4% |
| 2 | Coal India | 3.7% |
| 3 | CHN Energy | 3.7% |
| 4 | Jinneng Group | 2.9% |
| 5 | Cement industry of China | 2.8% |
| 6 | National Iranian Oil Company | 2.8% |
| 7 | Gazprom | 2.3% |
| 8 | Rosneft | 1.9% |
| 9 | Shandong Energy | 1.7% |
| 10 | China National Coal Group | 1.7% |
| 11 | Abu Dhabi National Oil Company | 1.6% |
| 12 | CNPC | 1.6% |
| 13 | Shaanxi Coal and Chemical Industry Group | 1.6% |
| 14 | Iraq National Oil Company | 1.3% |
| 15 | Shanxi Coking Coal Group | 1.3% |
| 16 | ExxonMobil | 1.3% |
| 17 | Sonatrach | 1.2% |
| 18 | Chevron | 1.1% |
| 19 | Kuwait Petroleum Corp. | 1.0% |
| 20 | Petrobras | 1.0% |
| 21 | Shell | 0.9% |
| 22 | Pemex | 0.9% |
| 23 | TotalEnergies | 0.8% |
| 24 | QatarEnergy | 0.8% |
| 25 | Lukoil | 0.8% |
| 26 | BP | 0.8% |
| 27 | Glencore | 0.7% |
| 28 | China Huaneng Group | 0.7% |
| 29 | Luan Chemical Group | 0.7% |
| 30 | Equinor | 0.7% |
| 31 | Peabody Energy | 0.7% |
| 32 | Nigerian National Petroleum Corp. | 0.6% |
| 33 | CNOOC | 0.6% |
| 34 | ConocoPhillips | 0.6% |
| 35 | Eni | 0.6% |
| 36 | Petronas | 0.5% |
Coal continued to be the largest source of emissions in 2023, representing 41.1% of emissions in the database and continuing a steady upward trend since 2016. Coal emissions grew by 1.9% (258 megatonnes of carbon dioxide equivalent – MtCO₂e) from 2022, while cement saw the largest relative increase at 6.5% (82 MtCO₂e), driven by expanding production.
In contrast, natural gas emissions fell by 3.7% (164 MtCO₂e), and oil emissions remained stable with only a slight increase of 0.3% (73 MtCO₂e).
Learn More on the Voronoi App
To learn more about this topic, check out this graphic that shows greenhouse gas emissions by sector in 2023, according to data was compiled by the United Nations. The power sector remains the largest emissions contributor.
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