ABOUT 200 nations have agreed to a legally binding deal to cut back on greenhouse gases used in refrigerators and air conditions. The deal, which includes the world’s two biggest economies, the United States and china, divides countries into three groups with different deadlines to reduce the use of factory-made HFC gases. Greenhouse effect or global warming is increasingly becoming a prime concern of the international community because of its serious consequences for the planet earth. Greenhouse gases trap heat and make the planet warmer. Human activities are responsible for almost all of the increase in greenhouse gases in the atmosphere over the last 150 years. A latest research has found that seven countries are responsible for two-third of greenhouse effect. The top contributor was found to be the US, which has released more than double the emissions of China, which ranks second. Russia, Brazil, India, Germany and the UK followed and they collectively account for 63% of global warming. In this backdrop, the decision of the top contributors (the United States and China) to go for fast implementation of the understanding is welcome but shamefully India has opted for a slower adoption, which speaks volumes about its approach to issues of concern to the humanity. It is also ironical that main culprits are seven countries that are industrially advanced and rich but the third world countries have been left to bear the consequences on their own. They have been demanding that the rich nations should provide them financial and technical assistance in tackling the challenges of global warming but so far nothing of the sort is in sight. Unless, there is an understanding on this vital issue, it is feared that majority of 200 countries would not be able to meet the deadline on their own.