Okay, here is the thing, iam trying to get in shape and I like outdoor activities rather than hitting a gym. I have been riding a bike for about 40 minutes 5 times a day but i do not see much change. Should i go back to walking instead? Does walking for 40 minutes burn as much calories as cycling for 40 minutes or does it burn more calories?

I do not agree with Biki....
go "CARB LESS" for at least 2 consecutive days in 2 weeks time frame

Its completely wrong. If you do not have Carbohydrate at all.. think of your blood glucose level... you need to keep blood glucose level to certain standard.... so stopping carobydrate may loose weight fast...... there are a lot of complication ... which may not be seen in short term... but think of long term.... fluctuationg blood glucose level is dangerous....

I remember of Aitkeins diet when Biki told about CARB LESS....  Depending a lot upon protein for ur diet as a replacement to your CHO puts a lot of pressure of your liver.... .. so I do not ever advocate CARB LESS DIET at all... However,, Aitkins Diet  will loose your weight drastically.....

Weird as it may sound, but drinking more water decrease weight.  Here is the scientific explanation.

To decrease weight you need to burn fat fast. However, when fat of your body is burn it produces toxic substances which is stored in kidney  and filtered out by it.  If you dont drink water these substances are kept stored in kidney. If these substances are stored in large proportion it may damage kidney. So our body automatically slows down burning of fat so less of this substances are produced. And thus slow burning of fat causes you to gain weight.

If you drink enough water you will be filtering these substances fast out of the body so that body is ready to burn fat more quicker.