A short thought on electric cars

The electric car is often brought forward as the saviour of the very oil-intensive transport sector. What is seldom mentioned when discussing its benefits is the source of energy. Sure combustion of oil-based fuels emits huge amount of carbon dioxide and other harmful pollutants. But as long as the energy source for an electric car is not sustainable, the benefits are small. Thus, the key here is to make our overall energy system sustainable. To remove natural gas, carbon and oil in electricity generation and instead move towards more sustainable sources, such as solar power, hydro power, wind power and some extent also nuclear power (although its sustainability may be controversial).

That is one of our major challenges for the near future...

[Electric Car] [Energy] [Oil] Share on Facebook

Distributed energy systems

In rural areas in developing countries there is today often a lack electricity. This could be solved in many ways and in the long run perhaps it is likely that there will be a mix of distributed and local energy systems. However, we are not there yet and electric grids are either severly lacking in coverage and quality or non-existent. Thus the other solution is to use small-scale distributed solutions, as many developing countries are in tropical areas the potential for photovoltaic solutions should be great.

Today photovoltaic cells suffer from two main problems, low efficiency and high costs. In the aforementioned context high costs is the main problem. Large research efforts are done in these areas and more cost efficient large-scale manufacturing of photovoltaic cells should be here soon. Bringing the generation of electricity closer to the end-user would bring large advantages from a technical point of view, but also when considering standard of living. Electricity in rural areas would bring better opportunities for schools and medical care. But also would help with another huge problems in these areas, clean water. The (cheap) electricity could be use for pumps and for cleaning water.


[Energy] [Photovoltaic] [Developing Countries] [Sustainability] [Water]Share on Facebook

Finite resources

Humanity is facing many challenges the coming century. To be the most definitive is not the threat of climate change our international terrorism. Something we cannot get around is how we use natural resources. If we keep consuming resources at a faster pace than they can be regenerated we are far out on very thin ice. Some obvious examples are oil and coal, but those could possibly be replaced by greener energy sources in the not too distant future. Furthermore, many metals we are using in large quantities are scarce. A sure sign of this is that the fast growing chinese economy is buying lots of rare metals and also is driving a lot of the global concrete and steel market. Firstly, we need to start reusing and recycling a lot more. What is
even scary is the large population in developing countries seeking a Western standard of life. Who are we to deny them that after raping the planet for a long time...

I guess that when one resources becoems to scarce or to expensive we will eventually move on to an alternative resource. But at some point there are no alternatives. We need to recycle and reuse. Further we need to use resources efficiently and minimise waste. Perhaps the a sustainable energy system is the key here, since we are really running out of oil and coal, not to mention the pollutions caused by those two.

Bottom line is, we cannot have a linear system for using finite natural resources. At some point we run out...

[Resources] [Energy] [Waste] [Environment] Share on Facebook