Disciplinary Core Ideas
Human Impacts on Earth Systems
• Human activities have significantly altered the biosphere, sometimes damaging or destroying natural habitats and causing the extinction of other species. But changes to Earth’s environments can have different impacts (negative and positive) for different living things.
• Typically as human populations and per-capita consumption of natural resources increase, so do the negative impacts on Earth unless the activities and technologies involved are engineered otherwise.
Human activities have significantly altered the biosphere, sometimes damaging or destroying natural habitats and causing the extinction of other species. But changes to Earth’s environments can have different impacts (negative and positive) for different living things.
Global Climate Change
• Human activities, such as the release of greenhouse gases from burning fossil fuels, are major factors in the current rise in Earth’s mean surface temperature (global warming). Reducing the level of climate change and reducing human vulnerability to whatever climate changes do occur depend on the understanding of climate science, engineering capabilities, and other kinds of knowledge, such as understanding of human behavior and on applying that knowledge wisely in decisions and activities.
1 Resources and Human Impact on Earth System
By: Kenzo Ariza-Uenishi
2 Human activities Deforestation Destruction of coral reefs
Intensive farmingPesticidePollutionOzone depletion
3 Burned and cut down trees Loss of biodiversity Reduced food source
DeforestationBurned and cut down treesLoss of biodiversityReduced food source
4 Destruction of coral reefs
coral reefs are home to 25% of all marine species25% of coral reefs are threatened in the world2050 - lose up to 70% of coral reef
5 Intensive Farming Is the latest technique used yield high productivity
To produce more foodUse more fertilisers and pesticidesDestroys quality of soil
6 Pollution Pollute air and water by harmful substances
7 Pollution Eutrophication
Bacteria decay the dead plants and in so doing use up oxygen from the waterThis means the fish suffocate and dieLose food, habitat and Oxygen production
8 Pesticides Kill harmless insects and other animals Alter food chain
Pollute the water
9 Ozone depletion Dangerous gas Speeds Greenhouse effect
Holes created by the ozone layer due to human activities
10 !!! We need less Deforestation Destruccion of coral reef’s Pollution
PollutionOzone depletion!!!
11 Human Development Index (HDI)
Measures a country’s average achievements in the areas of health, knowledge, and standard of livingHDI higher than 0.8 is considered “high human development“
12 What can we do ?? Organic farming Biological control pests
Organic farmingBiological control pestsDevelop alternative energy sourcesLess ozone depletion
13 Organic FarmingIs very important because don’t produce the pollution and problems of intensive farming
14 Biological Control of Pests
Using natural predators to eat pests instead of pesticides
15 Develop alternative energy sources
Solar powerWind power
16 Conclusion : We need to save the planet Earth because we are using one and half planet
