Share it Waste companies have long been comfortable dealing with regulations about tracking and reducing greenhouse gas emissions, but heightened attention may make that more complex in the years ahead. The pressure to address contributions to climate change is starting to come from new sources. Growing numbers of customers and investors are insisting that all industries — waste included — record greenhouse gas emissions and shrink their carbon footprints. In a relatively short period, considering how a company may be exacerbating the effects of climate change morphed from a peripheral concern for investors to a mainstream inquiry. “I continue to be impressed by how quickly this conversation has changed, and how rapidly it's evolved in the last few years,” said Hana Vizcarra, a staff attorney at Harvard Law School’s Environmental & Energy Law Program.