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Sir David Attenborough fronts a new documentary on lockdown's effect on the natural world.
Schools' climate change protests
Video caption: Sir David Attenborough new documentary on nature and Covid 
By Matt McGrath
Environment correspondent
By Matt McGrath
Environment correspondent
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Video caption: I Am Greta: Movie tells climate activist's 'coming of age' story A new documentary follows the teenage climate change activist through her rise to fame.
The child who tried to save the world... in 1992
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Video caption: "I knew what I was there to do": Severn Cullis-Suzuki speaks to BBC Ideas In 1992, when she was just 12, Severn Cullis-Suzuki warned the world about the environmental crisis. Here she tells her story.
'We stand with you' Bristol Cathedral tells Greta
Copyright: Bristol CathedralImage caption: Bristol Cathedral Bristol Cathedral says it stands with Greta Thunberg and the young climate activists, as thousands of people have joined the climate strike action.
The cathedral says it will be open as a refuge for anyone who wants a quiet space away from the crowds.
"The Diocese of Bristol has already declared a climate emergency and the Church of England has already committed all its churches to be carbon neutral by 2030.
"We stand with you."
Why has Greta chosen Bristol?
Copyright: Getty ImagesBristol has a history of campaigning for sustainability and in the 1970s and 1980s some of the UK's leading environmental charities chose to base themselves here.
The city was European Green Capital in 2015 and the council was one of the first in the UK to declare a climate emergency.
They have pledged to reduce carbon dioxide emissions by 40% by 2020 and 80% by 2050 and recently also declared an ecological emergency.
Many of the founder members of the national activist network Extinction Rebellion are from this part of the world as well as the head offices for Sustrans, City to Sea, the Bristol Community Energy Fund and the Bristol Energy Cooperative.
Copyright: PA MediaBy Judith Burns
Education reporter
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Video caption: What can school strikers learn from veteran protesters? Do today's school strikers think protests lead to change and what can they learn from the past?
By Paul Rincon
Science editor, BBC News website
