Fractions

fractions

"The question on the mind of many students, and I might add parents, is why do I need fractions anyway? Is it really that important? Can't I just leave this part out and continue to algebra? Just pretend it doesn't exist. Just think of how many times a day you have to assess a situation, divide up a workload, drive a car or even plan a meal

 A complete list of all of our math worksheets relating to fractions. Choose a specific addition topic below to view all of our worksheets in that content area. You will find addition lessons, worksheets, homework, and quizzes in each section.

Also we use fraction in measurements ,trigonometry, geometry, sequences, algebra, statistics,graphing, and  business so for this point  we know the importance of fractions which enter in all medias of our life.

Air Pollution

             Air Pollution

Household air pollution from solid fuels caused one in ten deaths in 2016, claiming more than 8,200 lives.  

The health effects caused by cooking with solid fuels include ischemic heart disease, cerebrovascular disease (stroke), lung cancer, and chronic obstructive pulmonary disease.

Very few households have adopted improved Cook stoves which are more efficient and cleaner burning. LPG has the lowest rate of use in the Americas. 

Biomass fuels are expensive, reflecting the scarcity of forested land. A kilogram of charcoal costs nearly fifty US cents. Thus a household can spend up to a dollar on charcoal per day, in a nation where the World Bank estimates more than half the population lived on less than US$1 a day as recently as 2012.

Description of Problem 

Household air pollution from solid fuels is the fourth-most serious risk factor in Haiti for death and disability, after child and maternal malnutrition, unsafe sex, and high blood pressure. It caused one in ten deaths in 2016, claiming more than 8,200 lives.  
Health effects include ischemic heart disease, cerebrovascular disease (stroke), lung cancer, and chronic obstructive pulmonary disease among adult women and men, and acute lower respiratory infections among children under five years of age and adult women and men. 
The vast majority of Haiti -- 94% of the population – cooks with solid fuels, evenly split between wood and charcoal.  Nearly half the population cooks outdoors, more than 1/3rd in a separate building, and 15% in the house.  Almost all households using solid fuels cook over an open fire or an open stove.  
Very few households have adopted improved cookstoves which are more efficient and cleaner burning. LPG has the lowest rate of use in the Americas. 
Biomass fuels are expensive, reflecting the scarcity of forested land. A kilogram of charcoal costs nearly fifty US cents. Thus a household can spend up to a dollar on charcoal per day, in a nation where the World Bank estimates more than half the population lived on less than US$1 a day as recently as 2012

Solutions

• Improved wood stoves: targeting the 48% of the population using wood as primary cooking fuel
• Improved charcoal stoves: targeting the 46% of households using charcoal as primary cooking fuel
• LPG stoves
• Ethanol stoves

Global warming

Global warming is a term used for the observed century-scale rise in the average temperature of the Earth's climate system and its related effects.

 Scientists are more than 95% certain that nearly all of global warming is caused by increasing concentrations of greenhouse gases (GHGs) and other   human caused emissions

Our atmosphere is getting hotter, more turbulent, and more unpredictable because of the “boiling and churning” effect caused by the heat-trapping greenhouse gases within the upper layers of our atmosphere. With each increase of carbon, methane, or other greenhouse gas levels in the atmosphere, our local weather and global climate is further agitated, heated, and “boiled.”

Global warming is gauged by the increase in the average global temperature of the Earth. Along with our currently increasing average global temperature, some parts of the Earth may actually get colder while other parts get warmer hence the idea of average global temperature. Greenhouse gas-caused atmospheric heating and agitation also increase the unpredictability of the weather and climate, and dramatically increase the severity, scale, and frequency of storms, droughts, wildfires, and extreme temperatures