In 2004, Nepal and Bhutan experienced In 2004, Nepal and Bhutan experienced

Malaria and Dengue fever for the first time.Malaria and Dengue fever for the first time.

Q: What are the conditions for diseases like Dengue?

Spread of infectious insect-borne diseasePoint•Insect-borne diseases spreads faster and breed in new areas

Explain why•The increased rainfall and temperature is favourable for insects to breed. •Therefore insects are able to breed in temperate countries now as the weather gets warmer. •This cause diseases to spread to new places.

Heat waves, floods, droughts and Heat waves, floods, droughts and

tropical cyclone have increased in the tropical cyclone have increased in the

last few decadeslast few decades

Q: What causes such weather events?

More frequent extreme weather events

Point•There are more occurrence of severe and rare weather phenomenon that results in economic losses and loss of lives.

Explain •Higher land and sea surface temperatures creates more water vapour and latent heat. •This results in more frequent and irregular weather events.

Majuro Atoll in the Pacific Ocean will lose 80% of its land

by half a metre if sea levels continue to rise at current rate.

Q: What causes sea levels to rise?

Sea level riseSea level risePoint•The mean height of the sea’s surface increased relative to the land.

Explain•Due to high temperatures, water expands and increases the sea height. •The higher temperatures also cause glaciers to melt and add the melt water to the sea.

In Canada, there is an increase in soybeans,

potatoes and wheat as the region is warmer.

In Yunnan, apples and cherries production is

reduced as they need cool conditions to grow.

Change in length of growing seasonsPoint•The growing seasons of certain crops could be lengthen or shorten.

Explain•Higher temperatures have led to longer growing seasons for some regions as cold regions are now warmer and conducive for crop growing. •However the cool regions are also getting hotter, and less conducive for certain crops to grow.

Change in length of growing seasonsPoint•The growing seasons of certain crops could be lengthen or shorten.

Explain•Higher temperatures have led to longer growing seasons for some regions as cold regions are now warmer and conducive for crop growing. •However the cool regions are also getting hotter, and less conducive for certain crops to grow.