Pursuing ` ` green '' agenda is no long - term solution to the wall we 're hurtling towards , says David Dove - Jay . Hadfield warns that `` we need to invent a lot of things '' before going to Mars , and that `` there 's no great advantage to being the early explorers who die '' . Dove - Jay : Launching missions to Mars would use less energy than those to the Moon . Mars program certainly has challenges to overcome , but technological gap between us and Mars is smaller than it was for the Moon back in 2005 , he adds .
Pursuing ` ` green '' agenda is no long - term solution to the wall we 're hurtling towards , says David Dove - Jay . Dove - Jay : Launching missions to Mars would use less energy than those to the Moon . Mars program certainly has challenges to overcome , but technological gap between us and Mars is smaller than it was for the Moon back in 2005 , he adds .