His company is often criticized for its environmental record, but Jeff Bezos, CEO of Amazon and the world’s richest man, said Monday that he was committing $10 billion to a new fund to tackle climate change. In a post to his 1.4 million followers on Instagram, the e-commerce tycoon said the Bezos Earth Fund would “fund scientists, activists, NGOs — any effort that offers a real possibility to help preserve and protect the natural world.” “Climate change is the biggest threat to our planet,” said Bezos, whose net worth is estimated to be around $130 billion. Hundreds of Amazon employees last month signed a blog criticizing the online retail giant’s climate policies and demanding it do more to tackle climate change. Amazon has been accused of creating vast amounts of waste from the packaging it uses for doorstep deliveries, as well as for the greenhouse gas emissions from huge fleets of vehicles.