#greenhouse-gas-emissions

#greenhouse-gas-emissions

Over those three decades, the U.S. population soared by 28% and the economy, as measured by gross domestic product adjusted for inflation, more than doubled. Yet U.S. emissions from many of the activities that produce greenhouse gases-transportation, industry, agriculture, heating and cooling of buildings-have remained about the same over the past 30 years. Transportation is a bit up; industry a bit down. And electricity, once the nation's largest source of greenhouse gas emissions, has seen its emissions drop significantly.

We need to talk about e-bikes and e-scooters: The city of Alameda encourages active transportation walking, bicycling and riding public transportation to reduce greenhouse gas emissions (GHGs) that cause global warming and sea level rise and for the health benefits. Marilyn Ezzy Ashcraft is the mayor of Alameda. (photo courtesy of Maurice Ramirez BANG archives) Transportation, primarily on-road travel, is the single largest source of GHGs in California, according to the California Air Resources Board.

In a video address to the United Nations Climate Summit on 24 September, Chinese president Xi Jinping announced that China will reduce greenhouse-gas emissions by 7% to 10% from peak levels by 2035. The pace at which China cuts emissions will have profound global impact. The country has accounted for 90% of the growth in the world's CO emissions since 2015 and it is now the largest GHG emitter in the world

When a fossil fuel is combusted, it releases energy, which boils water, which turns to steam, which drives a turbine, which generates electricity. This is an almost comically inefficient process, requiring immense amounts of material: more than 8bn tons of coal and 4tn cubic metres of fossil gas every year. And given the basic chemistry of combustion, it's unavoidable that burning all this stuff leads to an immense buildup of carbon dioxide in the atmosphere.

As fossil-fuel derivatives, plastics are made of refined carbon. By 2015, about 6.3 billion tonnes of plastic waste had been generated, with around 79% of this accumulating in landfills or the natural environment, where it breaks into ever smaller pieces. Each year, plastic production increases exponentially: the total weight of carbon in plastic has surpassed the mass of all animals combined, and is likely to equal the mass of all bacteria by 2095 (see 'Litter legacy').

Food banks can help prevent food waste by rescuing unsold food from grocers and retailers, thereby redistributing it to families in need.

It is critical that federal policymaking is informed by the best available scientific evidence. Decades of climate research have yielded expanded understanding of how greenhouse gases affect the climate.

Martinez et al. tested three different Roman concrete recipes with varying slaked lime-to-pozzolan ratios (1:2, 1:3, and 1:4), and assessed greenhouse gas and air emissions for each production stage based on known Roman construction practices. The results surprised the scientists. Per volume of concrete, the production process for Roman concrete ended up emitting as much and, in some cases, more CO2 than modern formulations.

The Complete Streets project along Richmond Street aims to lower car speeds and improve pedestrian safety through various installations including raised intersections, corner extensions, and flashing crosswalk signals.

Training the 123 billion parameter model produced approximately 20 kilotons of CO2 equivalents and consumed 281,000 cubic meters of water, equivalent to roughly 112 Olympic-sized swimming pools.

The International Court of Justice has issued an advisory opinion stating that climate change is an urgent and existential threat, primarily caused by human activities.

For Wopke Hoekstra, the EU's climate commissioner, that era is over. Europe would still lead, he said, but other countries must come forward too.

MethaneSAT, designed to evaluate greenhouse gas emissions with 'unprecedented resolution,' has disappeared in space, affecting climate change efforts supported by multiple organizations.

If you thought the city of Austin already had a program to install rooftop solar systems on its municipal buildings, you weren't alone. Many others believed the same.

California's Cap-and-Trade program has raised $33 billion since 2014, directing funds to both combat climate change and support communities, primarily focusing on low-income areas.

The vote comes as the Trump administration has begun the process of undoing scores of Biden's environmental and climate policies, while promoting fossil fuels such as oil, gas and coal.

In a recent study, researchers found that planting soybeans just a few weeks earlier can significantly enhance yields while reducing greenhouse gas emissions, particularly nitrous oxide.