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Replacing traditional sources of energy completely with renewable energy is going to be a challenging task. However, by adding renewable energy to the grid and gradually increasing its contribution, we can realistically expect a future that is powered completely by green energy.
The laws of nature tell us there's a finite amount of any substance on the face of the earth, and at some point, that's going to run out. And if we're smart and we have some grace and we have some willingness about our destiny, then we will take ourselves into the renewable world.
Just as fossil fuels from conventional sources are finite and are becoming depleted, those from difficult sources will also run out. If we put all our energy and resources into continued fossil fuel extraction, we will have lost an opportunity to have invested in renewable energy.
China has adopted and is implementing its national climate change program. This includes mandatory national targets for reducing energy intensity and discharge of major pollutants and increasing forest coverage and the share of renewable energy for the period of 2005 through 2010.
If you have a carbon cap and trade system, there'd be an agreed-to limit the amount of carbon we emit. That changes the economic picture for fossil technologies and for the renewable technologies. It makes the renewable technologies more attractive and the fossils less attractive.
I live in a province where we have the cheapest electricity in North America - indeed, in the Western world - but all of it is perfectly renewable because we have beautiful Manitoba Hydro. Every few tens of kilometers, we can put a river dam. Bingo. One gigawatt here. One gigawatt here.
We are not trying to prevent new clean energy businesses from succeeding. Any business that's economical, that can succeed in the marketplace, any form of energy, we're all for. As a matter of fact, we're investing in quite a number of them, ourselves - whether that's ethanol, renewable fuel oil.
As much as with increased exploration new gas reserves can be found, what must be obvious to all is that our oil and gas reserves are not renewable and they are diminishing, and to protect the generations to come, we must engage in nothing short of a radical shift in the diversification of the economy.
The notion that moving toward renewable energy will kill jobs is an absurdity on its face. The notion that we have to live smaller lifestyles; not have the American way of life or give up the American Dream is just ridiculous. It is the opposite of the case; a new energy paradigm will create opportunity.
An increased push for energy efficiency, renewable energy technology, electric mobility - along with the growing digitalization movement and a universal carbon pricing structure - would speed up the carbon-free future and the rise of a global middle class we desperately need. We can and must all do our part.
Today's energy mix is the result of yesterday's consumer habits, considerable investment, and various political decisions. The potential of renewable energies, now a well-established fact, is undeniable if given the time to arrive at the technical and economic maturity that will free them from subsidization policies.
After all, does it make sense to be chucking things like glass, paper, cardboard, wood, metals, plastics, and food waste into holes in the ground? No, it doesn't; especially when someone will pay you good money to take them off your hands or, in the case of wood and food waste, when you can turn them into renewable energy.
In reality, Republicans have long been at war with clean energy. They have ridiculed investments in solar and wind power, bashed energy-efficiency standards, attacked state moves to promote renewable energy and championed laws that would enshrine taxpayer subsidies for fossil fuels while stripping them from wind and solar.
During my travels in Iraq, Israel, Gaza, Brazil, Indonesia, Japan, Europe and all over the United States, I have seen and heard the voices of people who want change. They want the stabilization of the economy, education and healthcare for all, renewable energy and an environmental vision with an eye on generations to come.
Science tells us we need to keep the majority of fossil fuels in the ground, and that we must urgently invest in renewable energy, and other alternative industries. Doing so would create millions of jobs, ensure a fair transition for fossil fuel workers into new industries, and avert the most catastrophic climate breakdown.
In West Texas, where I grew up, I had a wind farm planned. I'd gotten the turbines bought and the land acquired, and then the renewable energy credit imploded, and it killed the margins, so the deal never worked, but the investment bank I was working with asked me and said, 'We really like what you did. Would you come to work for us?'
Sustainability is not just about adopting the latest energy-efficient technologies or turning to renewable sources of power. Sustainability is the responsibility of every individual every day. It is about changing our behaviour and mindset to reduce power and water consumption, thereby helping to control emissions and pollution levels.
Every day I get to 'Think' and work on everything from digitizing electric grids so they can accommodate renewable energy and enable mass adoption of electric cars, helping major cities reduce congestion and pollution, to developing new micro-finance programs that help tiny businesses get started in markets such as Brazil, India, Africa.
Already renewable energy advocates are noting that the 42 miles of above-ground right-of-way between Yosemite and the city could be fitted with enough solar panels to generate at least 40 megawatts per year - a proposal the San Francisco Public Utilities Commission has never seriously considered because they currently aren't required to do so.