impacts of global warming

Affects to animals

Impact humans and wild animals facing new challenge for survival because of climate change. More frequent and intense drought , storms ,heat waves,warming oceans can directly harm animals, destroy the places the live, and wreak have on peoples livelihoods and communities.

Changing Climate and the Maya

Maya civilization thrived thousands of years ago in present-day Central America. Anthropologists and archaeologists thought Maya culture originated in the northern reaches of what is now Guatemala about 600 BCE, and migrated north to the Yucatan Peninsula beginning around 700 CE.

Throughout the film Quest for the Lost Maya, a team of anthropologists led by Dr. George Bey discovers the Maya may have been in the Yucatan as far back as 500 BCE. This new evidence indicates the Maya of the Yucatan had a very complex social structure, distinctive religious practices, and unique technological innovations that made civilization possible in the harsh jungle.

affects to human beings

Change in world climate would influence the functioning of many ecosystems and their member species. Likewise, there would be impacts on human health. Some of these health impacts would be beneficial. For example, milder winters would reduce the seasonal winter-time peak in deaths that occurs in temperate countries, while in currently hot regions a further increase in temperatures might reduce the viability of disease-transmitting mosquito populations. Overall, however, scientists consider that most of the health impacts of climate change would be adverse.

Climatic changes over recent decades have probably already affected some health outcomes. Indeed, the World Health Organisation estimated, in its "World Health Report 2002", that climate change was estimated to be responsible in 2000 for approximately 2.4% of worldwide diarrhoea, and 6% of malaria in some middle-income countries (3). However, small changes, against a noisy background of ongoing changes in other causal factors, are hard to identify. Once spotted, causal attribution is strengthened if there are similar observations in different population settings.

The first detectable changes in human health may well be alterations in the geographic range (latitude and altitude) and seasonality of certain infectious diseases – including vector-borne infections such as malaria and dengue fever, and food-borne infections (e.g. salmonellosis) which peak in the warmer months. Warmer average temperatures combined with increased climatic variability would alter the pattern of exposure to thermal extremes and resultant health impacts, in both summer and winter. By contrast, the public health consequences of the disturbance of natural and managed food-producing ecosystems, rising sea-levels and population displacement for reasons of physical hazard, land loss, economic disruption and civil strife, may not become evident for up to several decades.