Remove Air Pollution Remove Greenhouse Remove Ozone
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Congress Considers First-Ever Purchase Incentive for Commercial EVs

Union of Concerned Scientists

Last week, Senators Schumer and Manchin announced a compromise on a reconciliation bill, called the Inflation Reduction Act of 2022 , that includes significant climate and air quality progress and a goal to reduce greenhouse gas emissions nationwide by 40 percent by 2030. A key step towards addressing climate change and air quality.

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The definitive CO2/CH4 comparison post

Real Climate

So this is an attempt to put all of that in context and provide a hopefully comprehensive guide to how, when, and why to properly compare the two greenhouse gases. You might recall that GWP is defined as the ratio on per-kg basis of the temperature impact of other greenhouse gases compared to CO 2 over a specific time period.

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Protecting Public Health Is Complicated. But Science Can Help, and the Time Is Now.

Union of Concerned Scientists

For example, inclusion of a non-chemical stressor—higher daily temperatures—was considered in the scientific document used to support the ozone standard , since there is evidence that exposure to higher daily temperatures together with ozone exposure is associated with higher mortality.

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Supreme Court Sidelines Science, Threatens Public Health: These Rules-in-Progress Show What’s at Stake

Union of Concerned Scientists

To explore a small piece of what is at stake, let’s take a quick look at some of the rules currently under review at the EPA: Air emission reporting requirements If finalized and implemented, this rule will improve the way air pollution emissions are estimated and collected by the EPA.

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Clean Fleets Rule Slated to Deliver Healthier Air for Californians

Union of Concerned Scientists

Trucks and buses on California’s roads and highways are responsible for the majority of lung-damaging fine particulate and ozone-forming nitrogen oxide emissions, and a sizable amount of climate-warming greenhouse gas emissions as well.

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Delivery Vans are Going Electric: Where and Why

Union of Concerned Scientists

Medium- and heavy-duty vehicles (MHDVs), like the big rigs on our highways and the vans that deliver our packages, make up just over 1 in 10 of the vehicles on our roads, but are responsible for over half of ozone-forming nitrogen oxide pollution and lung-damaging fine particulate pollution from on-road vehicles.

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Watching the detections

Real Climate

A second set of climate model simulations can be run with all of the factors we think of as important – the natural drivers of course, but also the anthropogenic changes (greenhouse gas changes, air pollution, ozone depletion, irrigation, land use change etc.).