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Tag: climate

Climate strikes spread worldwide as students call for action

Climate strikes spread worldwide as students call for action

Science
Media playback is unsupported on your device Thousands of school pupils worldwide have abandoned classrooms for a day of protest against climate change. India, South Korea, Australia and the US are among the countries where teenagers are already on strike.The day of action is expected to embrace about 100 countries. They are inspired by Swedish teenager Greta Thunberg, who protests weekly outside Sweden's parliament. Scientists say tougher measures are needed to cut global warming.The Paris climate agreement of 2017 committed nearly 200 countries to keeping global temperatures "well below" 2.0C (3.6F) above pre-industrial times and to striving for a maximum of 1.5C.The globally co-ordinated children's protests - promoted through posts on Twitt...
Climate change: What are your questions?

Climate change: What are your questions?

Science
Climate protests are happening around the world - are you among them?Or do you have a nagging feeling you need to know more about what's happening to our planet? If you can't see the chatbot above tap on this link.Is there a question about climate change you'd like us to answer? Tell us by using the form below. If you are reading this page on the BBC News app, you will need to visit the mobile version of the BBC website to submit your question on this topic. More on this subject: Let's block ads! (Why?) BBC News - Science & Environment
Ancient comet impact triggered fires, climate change, megafauna extinctions

Ancient comet impact triggered fires, climate change, megafauna extinctions

Science
March 13 (UPI) -- Scientists have uncovered new evidence that a cosmic impact sparked wildfires and triggered a period of global climate change at the end of the Pleistocene epoch some 13,000 years ago. Previously, researchers had only found evidence of the period of climatic change known as the Younger Dryas, or YDB, in the Northern Hemisphere. New findings, however, suggest the Southern Hemisphere also experienced a sudden climatic shift -- and much more. "We have identified the YDB layer at high latitudes in the Southern Hemisphere at near 41 degrees south, close to the tip of South America," James Kennett, geology professor emeritus at the University of California, Santa Barbara, said in a news release. Kennett is a proponent of the Younger Dryas Boundary Impact Hypothesis, which pos...
Climate change: Pledge to cut emissions from dairy farms

Climate change: Pledge to cut emissions from dairy farms

Science
A dairy firm is pledging to make its operations carbon-neutral from cow to supermarket by 2050, including more than 2,000 farms in the UK. This will require "radical changes" over the coming decades, including developing new technologies, the dairy co-operative, Arla Foods, said.It admitted the target was "ambitious", but said it was achievable.However, the Vegan Society said there was no way to make dairy a climate-friendly product.Gases which help to heat the atmosphere and contribute to climate change are a by-product of the dairy industry. They include direct emissions of methane, a potent greenhouse gas, from cows, and carbon dioxide and nitrous oxide from the likes of packaging, transportation and fertilisers. Arla, the lar...
Wetland mud is 'secret weapon' against climate change

Wetland mud is 'secret weapon' against climate change

Science
Muddy, coastal marshes are "sleeping giants" that could fight climate change, scientists say. A global study has shown that these regions could be awoken by sea level rise.Sea level is directly linked to the amount of carbon these wetlands store in their soil, the team reports in the journal Nature.Researchers studied the carbon locked away in cores of wetland mud from around the world. They say that the preservation of coastal wetlands is critical for mitigating global warming.The team was led by scientists at the University of Wollongong in Australia.How do marshes lock away carbon? Many habitats that are rich in plant life are important stores of carbon. But coastal wetlands are particularly efficient at locking it away. When...