COP26 begins: the leaders have left, so what next?

COP26 has only just begun, but has it already ended?  The big leaders have gone home, leaving their major commitments on the table. Some aim for net zero carbon by 2050, some 2060, others 2070. Disappointed? You’re not alone. We all know that urgent action needs to be taken now. There is some good news: more than 80 nations have pledged to cut methane emissions and world leaders have promised to end deforestation by 2030. Is it too little too late, or are we finally making progress? Today, our climate journalist Simon Roach breaks down what COP26 has offered so far, and what hope he has for the rest of the conference.