(waves rolling) (soft music) (engine whirring) - this island is called funafuti.slet, instead of an island, we call it an islet. - nearly two years now, but it's a good project for us, because before we used to use kerosene and petri, to make our lights on. so, but now it's very nice life at the moment, to use the solar. 10 houses, they use for, so it's house with solar. (indistinct) (scraping) - we're gonna interview sakalia, which is the leader of this islet, to tell us more about the bio-gas and why did they want it here. (speaking in tuvaluan) - okay, so it's a tank where they fill all the pigs feces inside. (speaking in tuvaluan) that pig feces will make up the gas from it, which is called the bio-gas. (speaking in tuvaluan) okay, so the pig feces, they will get it from the pig pen. (pig oinking) they'll fill it into these tanks. so he got his bio-gas from the government. so the government help him to get to know that they actually have bio-gas and he actually got it from them, to here. (speaking in tuvaluan) okay, so before he got this bio-gas, this tank, he