More than 400 churches in the United Kingdom plan to switch to clean energy providers for their light and heat, shifting spending of 1 million pounds ($1.4 million) to renewables from fossil fuels, two Christian charities said on Wednesday. The move is part of the Big Church Switch, an initiative launched in February by charities Christian Aid and Tearfund, which urged UK churches and households to use clean sources of energy instead of carbon-emitting fossil…