• Solar energy: projection will row per one gigabit per year. In 2016 it was exceeded 75x times
expectation. suuuper increase
• In the same time. Cost of solar cells decrease a lot due to economy, so there is a hope
We are able to use sun energy in another manner!!!
(You should control the peak, also if good. Some energy is useless in some cases, for ex if you need huge
amount of energy, you can change solar battery because more flexible, otherwise photovoltaic not useful in
the night. Not possible to use renewable resource all the day)
• Lot of auto manufacturers are moving to Electic vehicles
(Torna al primo ppt → picture of the world black no sun (first thing: light pollution; black area represents
poor area. Someone has no sufficient resource to increase expectation of life+ pollution area is in the
north). Same thing for internet users: able to have access to information technology, no Africa. Same thing
for progress of drinking water, no Africa and no India. Same thing for electricity. In general, always the
south.)
Sustainability: sustain can mean attain, support, uphold or endure.
Focuses on meeting the neds of the present without compromising the ability of the future generation to
meet their needs. Is composed 3 pillars: social, environmental, economics.
In this concept, we have to value the future more than the present if there is a cost, today over tomorrow if
there is a gain and certainty over uncertainty.
We have to talk about externality: effect of actors’ actions create damage to other people. (situa in which
failure of market) The point in which supply and demand meets is stable equilibrium. If there is externality
(pollution, etc.) I have to reduce by imposing carbon taxes for example, so supply increase because of the
external cost, so my socially optimal is less quantity and higher price. A solution would be increase the
demand (to return to the optimal point). Impo problem because if you not able to calculate there is a
problem.
Sustainable development is the organizing principle for meeting human development goals while
simultaneously sustaining the ability of natural systems to provide the natural resources an ecosystem
services based upon which the economy and society depends.
1997 Kyoto protocol: international treaty which extends 92 united nations. define some limits over
emission→ you should have same emission for 1999.
Impo result from ipcc global warming of 1.5 degrees, if temperature goes over future is unpredictable,
under could be sustainable
SDG 17 Indicators (food, water, education, gender gap, energy…) → most impo guide so far, also for the
future. If we are able to check, more possibilities.
Now examine sixth assessment report ipcc (most important institution on climate change)
→https://www.ipcc.ch/assessment-report/ar6/→ dai un’occhiata