- Trending Categories
- Data Structure
- Networking
- RDBMS
- Operating System
- Java
- MS Excel
- iOS
- HTML
- CSS
- Android
- Python
- C Programming
- C++
- C#
- MongoDB
- MySQL
- Javascript
- PHP
- Physics
- Chemistry
- Biology
- Mathematics
- English
- Economics
- Psychology
- Social Studies
- Fashion Studies
- Legal Studies

- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who

# What are the causes of droughts?

A drought is an event of prolonged shortages in the water supply or lack or insufficiency of rain for an extended period of time.

Causes of Droughts are:

**1. Deforestation** reduces the amount of water stored in the soil, as rain falls on the soil it leads to soil erosion and creates desertification which can lead to drought.

**2. Low surface water flows** using surface water in large amounts to irrigate crops and for various other human activities, results in drying up of groundwater, lakes, and rivers.

**3. Global Warming** emission of greenhouse gases such as carbon dioxide (CO_{2}), methane (CH_{4}), nitrous oxide (N_{2}**O), **and** chlorofluorocarbons (CFCs)** which increases the Earth’s temperature results in increased evaporation and less rainfall which leads to the drought.

**4. Air Circulation and Weather Patterns** water are stored in the ground and also in the air. Weather patterns rotate the water in the air which is sometimes gets delayed to reach in certain regions and leads to the drought in those regions.

- Related Articles
- If p, q are real and p≠q, then show that the roots of the equation $(p-q)x^2+5(p+q)x-2(p-q)=0$ are real and unequal.
- Given that \( \frac{4 p+9 q}{p}=\frac{5 q}{p-q} \) and \( p \) and \( q \) are both positive. The value of $\frac{p}{q}$ is
- Find the value of '$p$' if the numbers $x,\ 2x+p,\ 3x+p$ are three successive terms of the A.P.
- If $ p=-10$ find the value of $p^{2}-2 p-100 $
- If $p,\ q,\ r$ are in A.P., then show that $p^2( p+r),\ q^2( r+p),\ r^2( p+q)$ are also in A.P.
- If p 5 12 and 20 are in proportion find the value of p.
- What are the pitfalls of the Price Earnings Ratio (P/E Ratio)?
- Difference between ++*p, *p++ and *++p in c++
- Difference between ++*p, *p++ and *++p in C
- If \( P A \) and \( P B \) are tangents from an outside point \( P \). such that \( P A=10 \mathrm{~cm} \) and \( \angle A P B=60^{\circ} \). Find the length of chord \( A B \).
- From a point \( P \), two tangents \( P A \) and \( P B \) are drawn to a circle with centre \( O \). If \( O P= \) diameter of the circle, show that \( \Delta A P B \) is equilateral.
- Find the value of $p$ if \( 5 p+2=17 \).
- What are the P class and NP class in TOC?
- For what value of $p$, are $( 2p-1),\ 7$ and $\frac{11}{2}p$ three consecutive terms of an A.P.?
- Find the value of p for which the quadratic equation $(p + 1)x^2 - 6(p + 1)x + 3(p + 9) = 0, p ≠ -1$ has equal roots. Hence, find the roots of the equation.