Rabbits harnessed to carts with windmills
More ice festivals!
Snow-makers but on glaciers instead of ski resorts
Genetically engineered shore-birds that can actually digest plastic
Horses with solar hats
Mini-golf course windmills that can charge small batteries and electronics
Flotation devices for polar bears (to replace melting ice sheets)
More volcanoes=more land. Build more volcanoes.
Largish box fans that keep ice sheets cool in the summer.