Chocolate could soon be a thing of the past, after scientists warned that the cacao plant, from which chocolate is made, could disappear within 32 years.

Over half of the world's chocolate comes from just two countries in West Africa-Cote d'Ivoire and Ghana-where the temperature, rain, and humidity (湿度) provide the perfect conditions for cacao to grow. But the threat of rising temperatures over the next three decades caused by climate change, is expected to result in a loss of water from the ground, which scientists say could upset this balance.

According to the related data, a temperature rise of just 2.1℃ could spell an end for the chocolate industry worldwide by 2050. Farmers in the region are already considering moving cacao production areas thousands of feet uphill into mountainous area — much of which is currently preserved for wildlife. But a move like this could destroy ecosystems that are already under threat from illegal farming and deforestation.

Part of the problem, according to Doug Hawkins, is that cacao farming methods have not changed for hundreds of years. "Unlike other tree crops that have benefited from the development of modern, high producing kinds and crop management techniques to realize their genetic potential (潜能), more than 90% of the global cocoa crop is produced by small farms with unimproved planting material," he said, "It means that we could be facing a chocolate decrease of 100,000 tons a year in the next few years."

Now scientists at the University of California at Berkeley have teamed up with American candy company Mars to keep chocolate on the menu. Using the controversial (有争议的) gene-editing technology known as CRISPR they are trying to develop a type of the cacao plant able to survive in dryer, warmer climates. If the team's work on the cacao plant is successful, it could remove the need for farmers in West Africa to relocate to higher ground, and perhaps even allow cacao to be grown elsewhere in the world.

It can be really hard to learn a language well without living in a country full of native speakers! You have to find something interesting! Here's the solution: TV Series. 

Game of Thrones

You should really start watching it. The language is beautiful and easy to understand. Drama, love and good characters mark the show and there are actors from all around the world. You won't know what's going to happen at the ending. This is a must-see!

Sherlock

A British masterpiece. Is there any language learner who has not heard of Sherlock Holmes and his friend John Watson? The writers placed the stories into London in the 21st century, so it's basically a modern version of the original stories. Here you have everything that an English language learner could wish for: British accents, good acting, long and interesting conversations with a lot of humour. 

Friends

Everybody knows Friends, which couldn't be missed off of this list. With many different accents to be heard and lots of dialects, this is the perfect show for English learners. The plot is relatively simple to understand. Six friends battle with tough jobs, complicated relationships and life in Manhattan, New York. In parts of the show there are also British accents to listen to and learn. 

How I Met Your Mother

It is one of the most successful situation comedies in the United States, attracting the audience all around the world. It's about the life of five friends that live in New York, focusing on their work and their favorite free time activity: sitting in their favorite bar. You get to know many modern American expressions and can enjoy a lot of dialects that make the show even more interesting. 

For years the Italian city of Venice has been struggling with a few concerns. Saint Mark's Square is often flooded. Venice's waterways require repairs. But, by far, the biggest problem is the rapidly growing number of visitors to the city.

So city officials have decided to require all visitors to pay a fee to enter Venice. The money will help to pay for cleaning and other services that help to keep the city beautiful.

Venice's Mayor Luigi Brugnaro explained the decision to international media during a visit to Rome last week. "Venice is a wonder of the world and only in this way can it be saved," the mayor said. "The fee process will be experimental at first," he added.

A one-day visit will cost about $7. City officials have yet to decide when the fee collection will begin. The money will be collected by transport companies that bring the tourists to Venice. The city will set up cameras for those arriving in private cars. And there will be fines for those who do not pay the fee. Students, some workers and children under the age of six will not have to pay. Naturally, anyone born or living in Venice is exempt.

City officials hope this will prevent the overcrowding that often comes with large numbers of tourists. Some people living in Venice say they do not believe the fee plan will work. Lawyer Roberta Pierabon says it will be impossible to collect the money from everyone who visits the city. Visitors arrive from all sides. She does not believe tourists can be controlled and adds that she disapproves of the plan. Other Venetians like the idea. They say it will make tourism less aggressive. Venetians love their city and know it will never stop appealing to visitors. Venice is so special, they say, that it belongs to the whole of humanity.