以下是一篇雅思考试图标作文，题目为“全球二氧化碳排放量”。

The bar chart illustrates the global carbon dioxide emissions from 1990 to 2015. It is clear that the emission levels have increased significantly over the years.

In 1990, the total emission was around 22 billion metric tons. This figure increased to 35 billion metric tons in 2015, which is a rise of more than 50%. The years between 1990 and 2015 saw a steady increase in carbon dioxide emissions, with the exception of a slight dip in 2009, which was due to the global financial crisis.

The highest carbon dioxide emissions were recorded in 2013, with a total of 37 billion metric tons. This was followed by a slight decrease in 2014, before rising again in 2015. The increase in emissions can be attributed to the growing global population, increased industrialization, and the use of fossil fuels.

China is the largest contributor to global carbon dioxide emissions, with a total of 10 billion metric tons in 2015. The United States is the second largest contributor, with 5 billion metric tons in the same year. India, Russia, and Japan are also significant contributors, with emissions of 2.5 billion, 1.7 billion, and 1.3 billion metric tons respectively.

In conclusion, the global carbon dioxide emissions have increased significantly over the years, with China and the United States being the largest contributors. It is important for governments and individuals to take action to reduce carbon emissions and slow down the effects of climate change.