'Tax us more,' US billionaires say

"Tax us more!" was the message on Monday from about 20 super-wealthy Americans who urged presidential candidates to back higher taxes on the wealthiest to confront climate change and other priorities.

Burning fossil fuels poses existential threat to Earth

Burning coal for electricity is in decline, while the use of natural gas, solar and wind power are on the rise. But how close are we to creating a clean energy economy to help protect our planet from the impacts of climate ...

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