Sun: CONDOMS are the cheapest way to fight climate change, a controversial new report claims. It says putting the brake on global population growth is the most effective way to lower carbon emissions. Contraception would be FIVE TIMES cheaper than any other method of tackling the world’s greenhouse gases, claims the report for the UK’s Optimum Population Trust. The study – compiled by the London School of Economics – found every 4 extra spent on family planning for the next …