Hello .  And in this report I will tell you about global warming and its consequences.

 Global warming is likely to affect terrestrial ecoregions.  Rising global temperatures mean ecosystems will change;  some species are forced to abandon their habitats (perhaps before extinction) due to changing conditions, while others thrive.  Other effects of global warming include declining snow cover, rising sea levels, and weather changes that can affect human activities and the ecosystem. Studying the relationship between Earth's climate and extinctions over the past 520 million years, scientists at York University write: “Global temperatures predicted for  the coming centuries, could provoke a new "mass extinction", when more than 50 percent of animal and plant species will be destroyed. "

 Many species at risk are from arctic and antarctic fauna such as polar bears and emperor penguins.  In the Arctic, the waters of Hudson Bay are free of ice for three weeks longer than thirty years ago, which affects polar bears who prefer to hunt on sea ice.  This can negatively affect species that rely on cold weather, such as the gyrfalcon and snowy owls that hunt lemmings, which take advantage of the cold winter.  Marine invertebrates reach their peak growth at temperatures to which they have adapted, and cold-blooded animals in high latitudes and at altitudes usually grow faster to compensate for the short growing season.  Warmer than ideal conditions lead to a higher metabolism and, as a consequence, a decrease in body size, despite the increase in the amount of food, which in turn increases the risk of attack by predators.  Indeed, even a small increase in temperature during development reduces the growth efficiency and survival of rainbow trout. The increase in temperature begins to have a marked effect on birds, and the butterflies have shifted their ranges northward by 200 km in Europe and North America.  The migration range of larger animals may be limited by human development.  In the UK, spring butterflies appear on average 6 days earlier than two decades ago.

 I think this topic is very significant.