Understanding Global Warming

Global warming refers to the increase in the earth’s temperature over a hundred years. In the last 100 years, the earth’s temperature has risen between 0.4 and 0.8 °c.

Causes of global warming;

The main cause of global warming is the greenhouse effect which is the process by which certain gases in the atmosphere trap and emit infrared radiation; simply put, certain gases in the atmosphere prevent the escape of heat, thereby causing the earth to warm up. These gases are produced by a number of activities carried out by humans.


Important greenhouse gases include;

  1. Water vapour; this is the most abundant greenhouse gas, however it also serves as a medium of assessing global warming
  2. Carbon dioxide: released by respiration, deforestation, land use changes, burning of petroleum and coal products.
  3. Methane: this is produced through decomposition of wastes, agriculture (rice cultivation), ruminant animal digestion, manure management etc. it is more active than carbon dioxide but it is less abundant in the atmosphere.
  4. Nitrous oxide; produced by soil cultivation processes, use of fertilizers etc.
  5. Chlorofluorocarbons (CFCs): these are synthetic compounds, commonly used in air conditioners and refrigerators.

Effects of global warming

On the environment;

Oxygen depletion, increased heat waves (hotter days and nights), expansion of deserts, increase in sea levels (may lead to increased flooding).

On agriculture;

Changes in temperature and rainfall, changes in pests and diseases (these are climate sensitive), changes in nutritional quality of some foods.

What role do you play?

  1. Waste generation; by reducing the amount of waste you generate, you reduce the amount of waste that has to be decomposed. Reduce, reuse and recycle your material, purchase items with less packaging.
  2. Reduce electricity and fuel consumption: use energy saving items, reducing your electricity consumption reduces the amount of fuel used to produce them, take a walk sometimes, use less hot water, and use solar systems if you can afford it.
  3. Plant a tree or 20 trees if you like.
  4. Tell someone about global warming, share this article!

Abisola Oladele



Towards the end of my undergraduate studies, some conversations became popular among me and my friends one of which was what to do next once school finishes. I realized so many of my friends were making plans to either learn a trade, take a professional course, obtain one form of vocational skill or the other. Their options ranged from fashion designing, hair and make up etc. This is because everyone wants to become an entrepreneur because there are no jobs in the country that can cater for the amount of graduates produced yearly (I know we all know this). Each time I heard any of these things I would look at my friends funny, and say to myself after spending so and so number of years in the university, why would you need to spend another so and so number of years to learn another trade? It dawned on me that not once in my life have I had to make such plans, maybe because I’ve always known what I wanted or because after studying agriculture for 5 years (with one year of INTENSE internship training) I feel like I have learnt nearly everything I need to earn a living out of school, or at the very least, the basics. I believe I have learnt the ultimate trade, obtained an indispensable vocational skill ( i.e. the art of providing man with food) I know will never go out of style, well unless science develops a way for us to survive on only water. Lol. But on a more serious note, I think after studying agriculture all you really need is a little bit of start up capital to get your life moving. I know most graduates of agriculture think you need a huge capital + land + labour to do something meaningful in the agricultural sector. But I really don’t think so. Do you have that extra 10 k lying around hit me up I have at least 10 agribusiness ideas that require less than 10 k capital without the need for land or labour. Throw in a free plot of land and you have another 10 business ideas.

At the end of the day I’m really glad I chose to study agriculture and I would do it again if the need arises.


Abisola Oladele.