In today’s newsletter: Despite valid criticisms, the summits are filled with smart, passionate people dedicating their lives to fighting the climate crisis • Don’t get Down to Earth delivered to your inbox? Sign up here In today’s newsletter: Despite valid criticisms, the summits are filled with smart, passionate people dedicating their lives to fighting the climate crisis Don’t get Down to Earth delivered to your inbox? Sign up here I t is easy to criticise the UN climate conferences. But