Financial Times, 15 February 2018:

Elon Musk’s ambition to populate the world with electric vehicles
running on solar-powered batteries is a vision we can admire, but
pretending that Mars provides some insurance policy against fouling up
our planet is delusional (Opinion, Feb 10). Richard Branson is another
entrepreneur whose obsession with space travel is combined with concern
about climate change; but not every problem is amenable to planetary
techno-fixes.

The solution to climate change is closer to home and requires a huge
investment in renewables and energy conservation, combined with a
carbon tax that reflects the damage that fossil fuels impose on human
health and our environment. Virgin Galactic or building colonies on Mars
are vainglorious projects with little purpose and a huge carbon footprint.

Dr Robin Russell-Jones
Chair, Help Rescue the Planet,
Stoke Poges,
Bucks,
UK