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Sustainable world means meeting the needs of the present without compromising the ability of future generations to meet their own needs. What world citizens did to change the way we use resources early in this century will influence how we live for generations in the future.
Some kinds of sustainable energy include solar energy, wind energy, hydroelectric energy, tidal energy, etc. Using these energy, we can cause sustainable development to actually happen.
Sustainable development means meeting the needs of the present without compromising the ability of future generations to meet their own needs. What world citizens did to change the way we use resources early in this century will influence how we live for generations in the future.
Some kinds of sustainable energy include solar energy, wind energy, hydroelectric energy, tidal energy, etc.
CLIMATE CHANGE
we need to take part and try to stop global warming and other effects on climate change. If the earth's temperatures continue to rise in the future, living things on earth would become extinct due to the high temperatures. If humans contribute to control global warming, this world would be cooler and the high temperatures we currently have would decrease. If everybody as one take stand and try to end most of the climate changes that are occurring, this world would be a safer place to live on.
Extreme Heat
What we know:-India is already experiencing a warming climate.
What could happen:-Unusual and unprecedented spells of hot weather are expected to occur far more frequently and cover much larger areas.Under 4°C warming, the west coast and southern India are projected to shift to new, high-temperature climatic regimes with significant impacts on agriculture.
Changing Rainfall Patterns
What we know
A decline in monsoon rainfall since the 1950s has already been observed. The frequency of heavy rainfall events has also increased.
What could happen
A 2°C rise in the world’s average temperatures will make India’s summer monsoon highly unpredictable.
At 4°C warming, an extremely wet monsoon that currently has a chance of occurring only once in 100 years is projected to occur every 10 years by the end of the century.
An abrupt change in the monsoon could precipitate a major crisis, triggering more frequent droughts as well as greater flooding in large parts of India.
India’s northwest coast to the south eastern coastal region could see higher than average rainfall.
Droughts
What we know
Evidence indicates that parts of South Asia have become drier since the 1970s with an increase in the number of droughts.
Droughts have major consequences. In 1987 and 2002-2003, droughts affected more than half of India’s crop area and led to a huge fall in crop production.
What could happen
Droughts are expected to be more frequent in some areas, especially in north-western India,
Crop yields are expected to fall significantly because of extreme heat
Groundwater
What could happen
Although it is difficult to predict future ground water levels, falling water tables can be expected to reduce further on account of increasing demand for water from a growing population, more affluent life styles, as well as from the services sector and industry.
Glacier Melt
What we know
Glaciers in the northwestern Himalayas and in the Karakoram range - where westerly winter winds are the major source of moisture - have remained stable or even advanced.
On the other hand, most Himalayan glaciers - where a substantial part of the moisture is supplied by the summer monsoon - have been retreating over the past century.
What could happen
At 2.5°C warming, melting glaciers and the loss of snow cover over the Himalayas are expected to threaten the stability and reliability of northern India’s primarily glacier-fed rivers, particularly the Indus and the Brahmaputra. The Ganges will be less dependent on melt water due to high annual rainfall downstream during the monsoon season.
The Indus and Brahmaputra are expected to see increased flows in spring when the snows melt, with flows reducing subsequently in late spring and summer.
Alterations in the flows of the Indus, Ganges, and Brahmaputra rivers could significantly impact irrigation, affecting the amount of food that can be produced in their basins as well as the livelihoods of millions of people (209 million in the Indus basin, 478 million in the Ganges basin, and 62 million in the Brahmaputra basin in the year 2005).
Sea level rise
What we know
Mumbai has the world’s largest population exposed to coastal flooding, with large parts of the city built on reclaimed land, below the high-tide mark. Rapid and unplanned urbanization further increases the risks of sea water intrusion.
What could happen
With India close to the equator, the sub-continent would see much higher rises in sea levels than higher latitudes.
Sea-level rise and storm surges would lead to saltwater intrusion in the coastal areas, impacting agriculture, degrading groundwater quality, contaminating drinking water, and possibly causing a rise in diarrhea cases and cholera outbreaks, as the cholera bacterium survives longer in saline water.
Mumbai, both densely populated cities, are particularly vulnerable to the impacts of sea-level rise, tropical cyclones
Energy Security
What we know
Climate-related impacts on water resources can undermine the two dominant forms of power generation in India - hydropower and thermal power generation - both of which depend on adequate water supplies to function effectively.
To function at full efficiency, thermal power plants need a constant supply of fresh cool water to maintain their cooling systems.
What could happen
The increasing variability and long-term decreases in river flows can pose a major challenge to hydropower plants and increase the risk of physical damage from landslides, flash floods, glacial lake outbursts, and other climate-related natural disasters.
Decreases in the availability of water and increases in temperature will pose major risk factors to thermal power generation.
Water Security
What we know
Many parts of India are already experiencing water stress. Even without climate change, satisfying future demand for water will be a major challenge.
Urbanization, population growth, economic development, and increasing demand for water from agriculture and industry are likely to aggravate the situation further.
What could happen
In increase in variability of monsoon rainfall is expected to increase water shortages in some areas.
Studies have found that the threat to water security is very high over central India, along the mountain ranges of the Western Ghats, and in India’s northeastern states.
MANS NECESSITY LEADS TO THIS
