 I've spent the last five years traveling across Asia to those places that hold the world's last remaining tigers. I'm a conservation scientist and I've been trying to understand why conservation succeeds and why it fails. So I want to present to you two alternative future scenarios. One with and one without tigers and about what our role might be in determining those futures. Felly ydych chi'n ei wneud yn cyfath o'r cyffredin, sydd y tygaer byddai yn y gweithio'r ffordd. Felly, y tygaer y habitat, lle roedd yn gwneud yn ystod yn ymweld yma, mae'r bwyddiwch yn nid o'r 90% yn yr ysgol 100 oed. Mae'r ffordd o ffordd yn ymweld o'r 50,000 tygaer. Ond y hwn yn cyfyrdd y byd o'r tygaer yn ei ddweud ymweld yn y sgafodd i'r ffordd o'r ffordd. Yn rhan o'r ffordd o'r ysgol, I'r ddweud y bydd y cyfrifiad yn y swydd. Mae'r ddweud hynny wedi'i ysgrifennol ar gyfermodau. Mae'r ddweud yng Nghymru yn ymgyrch, yn ymgyrch ar gyfermodau, a'r ddweud ond mae'r ddweud yng Nghymru. Mae'r ddweud hynny yn ymgyrch, mae'r ddweud yn ymgyrch ar gyfermodau, ac rydyn ni'n gwybod eich bod ni'n gweithio, ac rydyn ni'n gweithio ar gyfermodau. Rydyn ni'n gweithio ar Cambodia. y mawr o'r cwntrwyr i South East Asia, sy'n 50% o'r llan yn ystod o'r ffordd. Mae'n gwybod bod yn ystod. Mae'n ystod o'r lastigau sydd wedi'i ffotograffu o'r cymddiad i Cambodia. Mae'r cymddiad yn y cwntrwy yn 2007. Y ddweud 1990, mae'r 100 cymddiad i'r cymddiad yn cymddiad i'r cymddiad. Mae'r cymddiad i'r cymddiad. Mae'r cymddiad i'r cymddiad i'r cymddiad, er nid o ffordd pethau a mu e'r cymddiad o'r cymddiad. Aisation untiud solied o ran hi ddim gweld Cwrs, mae'n ddechrau'n cael ei wneud. Rydyn ni'n ddim yn adnodd y rhan o'r ddaf, sy'n ddegleinio'r syniad, ac yn y gweithio y llwyaf ddegleddau sydd wedi'i adnodd ddegleddau'r rhan o'r ddegleddau ar y ddiweddodd teimlo yn gweithio gynnig. A'i rheshau yn y 1940, ddim yn ddim yn y 30-40 tygars. 40 tygars. Rhaid sy'n mynd i tygars yn y Llywodraeth yn y ddegledd cymaint gyda Carnetyca. But thanks to the efforts of a few dedicated physicists and policy makers, Tiger populations have subsequently increased some 10-fold over the following 60 years to an all-time high of about 500 tigers in the late 1990s. It wasn't rocket science, it involved complete ban on hunting and a strengthening of anti-poaching efforts. It also involved this national commitment to saving the tiger. For those countries where the tigers remain, securing their future is actually pretty simple. mae'r unrhyw o'r ddweud o'r cyfnod o'r hynod o'r dweud a'r hynny'n ddych chi'n gweithio'r cyfnod a'r ddych yn gyd yn gweithio'r ddweud Felly, mae'n ddweud ymddangos o'r cyflwyno ac yn enw i'r byddau a'r lleol A'r ddweud o'r ddweud o'r ysgrifennu A'r ddweud o'r ddweud o'r ddweud a'r ddweud o'r ddweud o'r ddweud That means holding those decision-makers to account. In an increasingly materialistic world in which we live, it's also about making some basic choices. A choice to actually save the tiger. It's not enough to just assume that tigers are going to be okay. Our experiences in Cambodia shows that they're going to crash far quicker than they can recover. And why even save the tiger? Tigers represent the true diversity of our natural world across much of Asia. They occur in the frozen forests of the Russian Far East, the hot, humid forests of Lolan forests in Southeast Asia, the dry forests of Indochina that occur across much of India. They're a top predator. They need food. They need space. They represent all that's healthy about these natural forests and about what they provide, not just for the tigers, but for some 12 million people that also depend on these forests. Everybody here knows something about the tiger, right? Maybe you watch it on TV or you read about it in school. The tiger is actually part of our everyday life all across the world, be it the beer you drink, the bags you use, the planes you fly in, the books you read as kids, the sports teams you support and the religions you follow. Tigers are a potent symbol of everything we value, particularly here in Asia. So if we can't save a species that's universally known and appreciated, what does that say about us as a society? Saving tigers isn't rocket science. Ironically, we've actually mastered rocket science, so why can't we master saving the tiger? Ultimately, it's all about the choices you make. I'm an eternal optimist. You really have to be in conservation, believe me. I visit India maybe once a year and those visits for me are something like a tonic, a bit of a drug. This is the only tiger I have seen and photographed ever in five years of walking all over tiger countries in Asia. This was taken in Corbett National Park in India last year. For those of you who haven't experienced it, it's very hard to convey the first moment you see a wild tiger. It's a truly beautiful thing and it really convinces you right then and there that you absolutely always have to have a world with wild tigers in it. My lack of tiger sightings is something I get a lot of stick from from my colleagues, but it makes an important point. India holds almost half of the world's remaining wild tigers. In a country that's pushing 1 billion people with one of the fastest growing economic growth rates on the planet, India this year reported a slow but steady increase in its wild tiger population. Right, exactly. So India made a very bold choice back in the 1970s when Indira Gandhi committed to saving the tiger and launch Project Tiger. It hasn't always been a smooth road, but that gives me an awful lot of hope for a future for tigers across all of Asia. Thanks very much.