Climate Change is the most discussed issue in the present world and it attracts the attention of all walks of people in locally and globally. Environmental scientists and activists are mostly concerned about the rapid changes of climate. The climate is weather averaged over a long period of time typically 25 to 30 years in a particular area.
According to the Inter-governmental Panel on Climate Change (IPCC) definition, Climate in a narrow sense is usually defined as the “average weather” or more rigorously as the statistical description in terms of the mean and variability of relevant quantities over a period of time ranging from months and thousands or millions of years. The parameters that determine the climate at a particular area are the rainfall, humidity, wind, sunshine and temperature. Definition of Climate Change in Oxford Dictionary is as “changes in the earth’s weather, including changes in temperature, wind patterns and rainfall, especially the increase in the temperature of the earth’s atmosphere that is caused by the increase of particular gases, especially carbon dioxide”. Generally Climate change refers to long term changes in climate including average temperature and precipitation. Earth’s climate is changing and this is causing great concern. The changes place in the atmosphere have become one of the serious threats that world faces today.
Mostly human activities are responsible for climate change. Human induced activities are burning of fossil fuel, deforestation, leading of luxurious life, industrial activities etc. These activities enhance the emission of greenhouse gases (methane, carbon-di-oxide, sulfur-di-oxide etc.). Greenhouse gases emission to an extent that nature system is now not able to assimilate these gases. As a result the earth becomes warm and increases temperature, rate of melting of snow and ice in polar region. Serious consequences will be a rise in sea levels, which will endanger coastal areas and small islands.
Climate change has started endangering biodiversity, food and fresh water supply, impacting human health worldwide, especially in developing countries like Bangladesh due to low adaptive capacity. Mass awareness about environment and contribution of international community in reducing greenhouse gas emission can lessen the devastating change of climate.
Climate change has started endangering biodiversity, food and fresh water supply, impacting human health worldwide, especially in developing countries like Bangladesh due to low adaptive capacity.we all should be aware about this problems.and take steps too.