This takes me back to my days as a young hippy reading the Mother Earth News' special technology features, because similar plans have been touted as enviro-cure-alls for at least 30 years. The idea is you build a huge (1 kilometre wide) platform of solar panels in geosynchronous orbit, have it collect solar energy, and then beam this to the ground in the form of microwaves.
The main problem is cost, which will run into the 10s of billions, although that is not nearly as hefty a sum as the cost of some of the wilder geo-engineering proposals now under discussion. One apparent non-issue is the problem of accidentally incinerating anything that gets too close to the vast field of microwave collectors you need at ground level:
The peak density of the beam is likely to be significantly less than noon sunlight,
and at the edge of the rectenna equivalent to the leakage allowed and accepted by
hundreds of millions in their microwave ovens. This low energy density and choice
of wavelength also means that biological effects are likely extremely small, comparable
to the heating one might feel if sitting some distance from a campfire.
Meanwhile, hopefully later today, I'll take a look at some of the actions taking place within the Canadian business community in response to climate change.