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Today I’m going to talk about: Poison I’ve divided my presentation into two parts: First I’d like to introduce the poison and second I’ll present of same kinds of poison. So, let’s start with introduce Poison, any substance that produces disease conditions, tissue injury

Today I’m going to talk about: carcinogen Carcinogen, any chemical, biological, or physical agent that can potentially be a cause of cancer. The term is most commonly applied to chemicals introduced into the environment by human activity. Researchers label a substance a c

Bacteria, one-celled organisms visible only through a microscope. Bacteria live all around us and within us. The air is filled with bacteria, and they have even entered outer space in spacecraft. Bacteria live in the deepest parts of the ocean and deep within Earth. They are in the soil, in our

Today I’m going to talk about: Radiation effects I’ve divided my presentation into one parts: First I’d like to introduce radiation effects, and second I’ll deal with the effects. So, let’s start with introduce radiation effects Radiation Effects, effects obs

Today I’m going to talk about: blood I’ve divided my presentation into two parts: First I’d like to talk about Blood and second I’ll present characteristics of blood groups. So, let’s start with blood Blood, is a vital fluid found in humans and other

Today I’m going to talk about: Acid rain I’ve divided my presentation into two parts: First I’d like to introduce of acid rain and second I’ll say same effects of acid rain. So, let’s start with introduce Acid Rain, form of air pollution in which airborne acids pro