| UPDATED: 15:31, Mon, Feb 15, 2021 Link copied Bill Gates says he’s ‘surprised’ by Covid-19 conspiracies Sign up to receive our rundown of the day's top stories direct to your inbox SUBSCRIBE Invalid email When you subscribe we will use the information you provide to send you these newsletters. Sometimes they'll include recommendations for other related newsletters or services we offer. Our Privacy Notice explains more about how we use your data, and your rights. You can unsubscribe at any time. The Microsoft founder's new book, titled 'How to Avoid a Climate Disaster', will be released this week as Bill Gates aims to rally the world behind the fight against global warming. Mr Gates' recent campaigning has seen him emphasise the importance of bringing the 51 billion tonnes of greenhouse gases added to the atmosphere each year down to zero if we are to save the planet. The entrepreneur has called on governments to lead in taking on the huge task of reaching the net zero mark. Renewable sources like wind and solar can help us decarbonise electricity but, as Mr Gates points out, that's less than 30 percent of total emissions.