Agence France-Presse: Fixing deforestation, preserving peatlands and ending reckless agricultural methods could be a major weapon in tackling climate change, the UN Environment Programme (UNEP) said on Friday. Biological systems, if responsibly managed, can absorb billions of tonnes of the dangerous carbon gases that fuel the greenhouse effect, the agency said in a report coinciding with World Environment Day. Trees and plants suck in carbon dioxide (CO2), the principal greenhouse gas, through …