A Rocha was speaking after Solar Impulse 2 landed in Spain, completing an unprecedented three-day flight across the Atlantic in the latest leg of its globe-circling journey.
The Solar Impulse 2 (below) landed in Seville in southern Spain on Thursday, ending a 71-hour, eight-minute flight which began from New York City on Monday.
It was the first time a solar-powered plane has made such a journey using zero fuel and zero emissions, organisers said.
They also said the aircraft had flown 4,204 miles at a maximum height of 28,000 feet and average speed of 59 mph.
It was the 15th leg of a planned around-the-world flight which began in March 2015 from Abu Dhabi in the United Arab Emirates.
The wings of Solar Impulse 2, which stretch wider than those of a Boeing 747, are equipped with 17,000 solar cells that power propellers and charge batteries.
The plane runs on stored energy at night.
The flight was piloted by Swiss men Bertrand Piccard and Andre Borschberg (above, main).
Andy Lester, from A Rocha, told Premier: "It's a fantastic achievement, and when you think this is a plane with a 72-metre wingspan, it's got 17,000 solar cells and it's 2.3 tonnes in weight, and yet it's been effectively powered by nature - what a huge achievement.
"We hope it will inspire many businesses and entrepreneurs to say: 'well look, if you can do that, we can really change the world in terms of its relationship to energy."
Listen to Premier's Aaron James speaking to Andy Lester:
