John Field : America urgently needs to implement Obama 's Climate Action Plan . He says we ' ve been pumping massive amounts of CO₂ into atmosphere since 1800s . The resulting global warming , about 1.5 degrees Fahrenheit , will persist for at least 1,000 years . He says our buildings , cars , power plants lead us to to a path that needs to change . Field : If we do n't , we will weather extremes , threats to human health .
John Field : America urgently needs to implement Obama 's Climate Action Plan . He says we ' ve been pumping massive amounts of CO₂ into atmosphere since 1800s . He says our buildings , cars , power plants lead us to to a path that needs to change . Field : If we do n't , we will weather extremes , threats to human health .