Lawmakers in the UK Parliament have declared "an environment and climate emergency," making it the first country in the world to do so. . There's no clear definition of what declaring a "climate emergency" means, but several cities, including Bristol and London, have already declared their own. Labour motion in UK Parliament also called on the government to set a target of reaching zero emissions before 2050. On this edition of The Big Picture we will take a closer look at climate change and how serious the world is about tackling it?