(Reuters) - Tech and financial companies leading efforts to cut climate changing emissions are finding a new challenge from remote work: the CO2 spewing out of home offices. A few companies have begun counting what happens when employees boot up computers at home, turn up gas furnaces and ignore the world's most energy-efficient corporate campuses. It turns out that home setups popularized by the pandemic are eroding some of the climate benefit of abandoned commutes. “Emissions didn't go away," said Amanda von Almen, head of emissions reduction at Salesforce.com Inc. "They just shifted to another area." Half of 20 big...