EcoWarriorMe

What is the point of exams? Is it to test the candidate's knowledge of the subject or is it to test the candidate's skill in passing exams? In theory at least, it should be the former but when there is a lot riding on the result there is a tendency towards the latter with students placing more emphasis on training to pass the exam rather than gaining a deep understanding of the subject. The student may gain some knowledge of the subject, but only those parts that will gain most marks in the exam as part of a strategy to maximise the result for minimum effort. This doesn't only apply to academic exams.  Similar strategies can also be adopted for all sorts of tests.  For example, if a car maker wants their car to get a good fuel efficiency rating they can work on scoring better in the test, rather than improving the car's performance.  They can use non-standard high performance lubricants, disconnect the alternator, over inflate the tyres, remove door mirrors and

A book and a wind-up torch. During Earth Hour, I learned the following: The origin of apples; A little about the last few months of Leon Trotsky’s life before being exiled; That I can still read a book in the dark with a torch (like I did as a child, under the blanket after bed time); And, thanks to @glasgow_kat, that petrochemical candles have much higher emissions than an electric light. Earth Hour is a fantastic way to highlight the problem of climate change in solidarity with people across the globe but it is not enough on its own. Switching the lights off on landmarks from Sidney Opera House to the Eiffel Tower to the Empire State Building for one hour is purely symbolic. Even switching them off permanently would be insignificant. The kind of reduction in fossil fuel use that we need to achieve would be more like everyone everywhere turning off the lights, heating, air conditioning, refrigeration, computers, televisions - everything for an hour. Not just once a year

On noticing that this would be EcoWarriorMe's 100th post, I thought it would be a good opportunity to review what we set out to do and how the blog has developed over the past two years and to highlight some of the most popular posts and personal favourites. The blog was born of a frustration at the general apathy and lack of progress towards a more sustainable society including climate change, pollution, wasteful squandering of precious resources and the relentless despoiling of our natural environment.  I aimed to highlight things that we can do to reduce our negative impact and demystify some of the competing arguments for and against particular courses of action.  I knew that I didn't have all of the answers and I still don't. I don't even know all the questions although I'm working on that. I enjoy learning and am interested in the science and engineering on which our modern society is based but I expected to probe a bit deeper rather then taking things at fa