Witnessing natural wonders across the globe is one of the greatest thrills for wildlife fans. But anyone who really cares for the environment will wrestle with their conscience when it comes to travel.
BBC TV presenter Liz Bonnin is no different.
The trained biologist and biochemist, who has carved out a career reporting on worldwide nature stories, can currently be seen on British TV screens in an ambitious new documentary about the future fate of animals on the Galapagos.
But embarking on long-haul, fuel-guzzling journeys to fragile ecosystems isn't something environmentally conscious Bonnin takes lightly.
"I think there's a really good balance to be struck," she says, during a break in filming for BBC Two's Stargazing Live in Australia.