Davos 2020 news – live: Trump condemned for ignoring climate change in speech as Greta Thunberg says president's tree planting pledge will not save planet

Conrad Duncan, Andy Gregory, Emma Snaith

Greta Thunberg and Donald Trump have traded veiled barbs at Davos as climate change and sustainability lead the agenda at the World Economic Forum.

The teenage activist told the world's political and business leaders that the global youth movement inspired by her school strikes are “just the very beginning” and warned Mr Trump's pledge to join an initiative to plant one trillion trees was "nowhere near" the action required to avert catastrophe.

Despite his tree-planting vow, Mr Trump decried climate "prophets of doom"​ during his address to delegates and said the US would defend its economy, extolling the benefits of oil and gas. It comes on the same day that his impeachment trial in the Senate begins in earnest.

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