Can someone shorten this into a 1 minute speech?

Rising levels of carbondioxide in the atmosphere are having a negative impact on the koalas. This pollution is contaminating eucalyptus leaves by destroying all nutrients in them. According to Ian Hume, professor of biology in Sydney University, the current levels of cabondioxide if they keep rising, will reduce the varieties of eucalyptus trees the koalas feed on. Out of more than 600 eucalyptus species, koalas feed on only 25. Koalas produce only one young a year under certain conditions. They have adapted to their poor nutritional diet by sleeping longer to conserve their energy, so they could end up producing one young every 3 to 4 years. Koalas sleep for 20 hours everyday and forage for food for the remaining 4. Parts of Australia are already seeing them disappear due to climate change, while their population has shown increase in other areas. Growing demand for housing and farms have already displaced the koalas from the more nutritious trees.