If you believe in thermometers（温度计）,you should believe in global warming. And if you believe in eating fries with your burger, you should worry more about carbon emissions.

It won't happen overnight, but as the planet's climate changes, the growth cycles of main crops will all be heavily affected .Here are three of the crops that might not beat the heat.

The potato actually needs a great deal of beauty rest to develop properly. “They need a cool nighttime temperature in order to start growing the tuber, the part that we eat,” Nelson says.

Temperature and altitude are two primary concerns in coffee growth, and farmers are stuck between a rock and a hard place. “We know that coffee grows in a certain temperature range,” Nelson says. “They've been moving up the mountains, but at some paint you run out of mountains to move up.” Higher-grade strains of Arabica coffee in Central American regions are at particular risk due to the need for lower growing temperature, especially since diseases and pests are also becoming more of a factor as temperatures rise.

Even if you're looking at the direct effects of temperature alone, rice is in trouble. “As nighttime temperatures go up ,the rice is going to have a problem flowering and won't make as many seeds,” Nelson says. In addition to this direct heat consequence, rising sea levels will flood many rice fields and destroy water salinity levels, while droughts will lower production, raise prices, and further shame westerners who are too clumsy with chopsticks to be able to clear their plates once a new grain is adopted.

The cicada（蝉）has an interesting life cycle, but most of us only become aware of these insects in summer when they reach adulthood and begin their calls. 【小题1】Some, like the Golden Emperor, have complicated songs. The summertime calls of the cicada are made by adult males to attract females. Their eggs are usually laid in scratches cut through the skin of the tree. Once it has been completed, the adults die.

When the eggs hatch, the larvae（幼虫）drop to the ground and live under the soil.【小题2】They spend as little as several months for some species or as long as several years for other species buried under ground, shedding（蜕下）their skin as they grow. They shed their skin for the last time to become adult cicadas with their wings. 【小题3】 A few days after coming out of the soil, the males call for mates and cycle begins again.

The Golden Emperor, whose call is quite different from others, is one of Australia's biggest and prettiest cicadas. 【小题4】 The Golden Emperor calls in groups, but getting to see one up close is very difficult as they fly away when approached. Also, as their breeding season progresses, they gradually move higher up the tree trunks.【小题5】 The Golden Emperor is a delight just to listen to if you can't see the insect itself.

Baby deer, also known as fawns, are born with white spots on their body, especially in the first few weeks of their life when they are incapable of moving. Basically, fawns with spots managed to survive more than fawns without spots. This gene has become dominant, and now, most fawns are born with spots.

Their mother generally hides the young babies in deep bushes, high grasslands, or under plants in the woods. The white spots on their reddish-brown body fur allow them to mix easily with the forest surroundings and don’t make them to stand out, avoiding them from getting discerned easily.

More than the color, the pattern of these spots on the baby deer’s body is also of more importance. This is because the majority of the animal species, particularly those living out in the wild don’t have a great color vision, especially when compared to humans. The pattern of the white spots on the fawns helps them to hide among the tall grass and bushes and prevents them from easily getting spotted from a distance. The sun enter deep into the forest, through the branches and leaves of tall trees, and creates a pattern of darker and lighter zones on the forest ground, much like spots on a fawn.

Moreover, they don’t bear any kind of smell during this phase of their life which further helps them in avoiding detection. Along with this, they have got a strong sense to observe the presence of hunters nearby, after which they can lower their heartbeat. This further helps them to hide and be perfectly still.

Undoubtedly, spots on the fawn’s body are a method of protection to fawns. Once they survive the initial few weeks in this world, they become capable of moving around on their own and hence don’t require the extra layer of safety, the white spots start to fade from their body.