Uy, Aljan Auie C.Define the following, Climate changeClimate changeis a change in the statistical distribution ofweatherpatterns when that change lasts for an extended period of time (i.e., decades to millions of years). Climate change may refer to a change in average weather conditions, or in the time variation of weather around longer-term average conditions (i.e., more or fewer extreme weather events). Climate change is caused by factors such asbioticprocesses, variations insolar radiationreceived by Earth,plate tectonics, andvolcanic eruptions. Certain human activities have also been identified as significant causes of recent climate change, often referred to as "global warmingGlobal environment and IssuesWhat is Biodiversity?The variety of life on Earth, its biological diversity is commonly referred to as biodiversity.The number of species of plants, animals, and microorganisms, the enormous diversity of genes in these species, the different ecosystems on the planet, such as deserts, rainforests and coral reefs are all part of a biologically diverse Earth.Appropriate conservation and sustainable development strategies attempt to recognize this as being integral to any approach to preserving biodiversity. Almost all cultures have their roots in our biological diversity in some way or form.Loss of Biodiversity and ExtinctionsDespite knowing aboutbiodiversitys importancefor a long time,human activity has been causing massive extinctions. As theEnvironment New Service, reported back in August 1999 (previous link): the current extinction rate is now approaching 1,000 times the background rate and may climb to 10,000 times the background rate during the next century, if present trends continue [resulting in] a loss that would easily equal those of past extinctions. (Emphasis added)A major report, theMillennium Ecosystem Assessment, released in March 2005 highlighted a substantial and largelyirreversible loss in the diversity of life on Earth, with some 10-30% of the mammal, bird and amphibian species threatened with extinction, due to human actions.The World Wide Fund for Nature (WWF) added thatEarth is unable to keep up in the struggle to regeneratefrom the demands we place on it.The International Union for Conservation of Nature (IUCN) notes in a video that many species are threatened with extinction. In addition, At threat of extinction are. 1 out of 8 birds. 1 out of 4 mammals. 1 out of 4 conifers. 1 out of 3 amphibians. 6 out of 7 marine turtles 75% of genetic diversity of agricultural crops has been lost 75% of the worlds fisheries are fully or over exploited Up to 70% of the worlds known species risk extinction if the global temperatures rise by more than 3.5C 1/3rdof reef-building corals around the world are threatened with extinction Over 350 million people suffer from severe water scarcity

Global sustainabilityInecology,sustainabilityis howbiological systemsremaindiverseand productive. Long-lived and healthywetlandsandforestsare examples of sustainable biological systems. In more general terms, sustainability is the endurance of systems and processes. Theorganizing principlefor sustainability issustainable development, which includes the four interconnected domains: ecology, economics, politics and culture.[1]Sustainability scienceis the study of sustainable development and environmental science.[2]Healthy ecosystems andenvironmentsare necessary to the survival of humans and other organisms. Ways of reducing negative human impact areenvironmentally-friendly chemical engineering,environmental resources managementandenvironmental protection. Information is gained fromgreen chemistry,earth science,environmental scienceandconservation biology.Ecological economicsstudies the fields of academic research that aim to address human economies and natural ecosystems.

Batadrice terraces, The Philippines UNESCO World Heritage siteMoving towards sustainability is also a social challenge that entailsinternationaland nationallaw,urban planningandtransport, local and individuallifestylesandethical consumerism. Ways of living more sustainably can take many forms from reorganising living conditions (e.g.,ecovillages,eco-municipalitiesandsustainable cities), reappraising economic sectors (permaculture,green building,sustainable agriculture), or work practices (sustainable architecture), using science to develop new technologies (green technologies,renewable energyand sustainablefissionandfusion power), to adjustments in individuallifestylesthat conserve natural resources.Despite the increased popularity of the use of the term "sustainability", the possibility that human societies will achieve environmental sustainability has been, and continues to be, questionedin light ofenvironmental degradation,climate change,overconsumption, and societies' pursuit of indefiniteeconomic growthin aclosed system.

Tourism Sustainability"Sustainable tourism is the concept of visiting a place as a tourist and trying to make only a positive impact on the environment, society and economy."Tourism can involve primary transportation to the general location, local transportation, accommodations, entertainment, recreation, nourishment and shopping. It can be related to travel for leisure, business and what is called VFR (visiting friends and relatives).There is now broad consensus that tourism development should be sustainable; however, the question of how to achieve this remains an object of debate.

Principle 1 .Human beings are at the centre of concerns for sustainable development. They are entitled to a healthy and productive life in harmony with nature.-the role of man. Humans beings, the top in the food chain, need nature more than anything else in the planet. In order to continue living our life in this world, we should know how to preserve, protect, and care for the environment.

Principle 2: States have, in accordance with the Charter of the United Nations and the principles of international law, the sovereign right to exploit their own resources pursuant to their own environmental and developmental policies, and the responsibility to ensure that activities within their jurisdiction or control do not cause damage to the environment of other States or of areas beyond the limits of national- state sovereignity. As for the state, which basically controls the number 1 in the food chain, should be responsible enough when it comes to doing something especially if it has something to do with the environment. The state should not interfere witg other state's environment as much as possible.

Principle 3: The right to development must be fulfilled so as to equitably meet developmental and environmentalneeds of present and future generations.-right to development. The environment must be preserved, or in some circumstances, be changed or replaced by human beings who will conduct research or any other kind for the innovation of man.