Addressing the twin challenges of carbon emissions and biodiversity loss requires political will and leadership. Ambitious commitments must be made

Achieving net zero will require action from everyone – and a renewed emphasis on science and innovation, says Patrick Vallance, the UK government chief scientific adviser

Rejoice at the worldwide success of research and technology, but if we don’t follow the rules it could all be for nothing

Any vaccine has to work, but it also has to be safe. Making it happen is one of the government’s biggest priorities, Patrick Vallance