They have already been doing it ever since the Viet Nam war!

Harvard has long been home to one of the fiercest advocates for climate engineering. 

This week, Harvard's School of Engineering and Applied Sciences published a research announcement headlined "Adjusting Earth's Thermostat, With Caution." 

That might read as oxymoronic — intentionally altering the planet's climate has rarely been considered a cautious enterprise — but it fairly accurately reflects the thrust of several new studies published by the Royal Society, all focused on exploring the controversial field of geoengineering.