Water Pollution
This term describes the enrichment of water bodies with nutrients, leading to algal blooms.
Eutrophication
Recycling this metal saves a lot of energy compared to mining it.
Aluminum
This law protects the nation's drinking water.
Safe Drinking Water Act
High nitrate and phosphorus levels can lead to this aquatic effect.
Algae bloom
The point on a dose-response graph where 50% mortality is observed.
LD50
A point source of water pollution.
Factory effluent
This kind of site is contaminated with hazardous materials and underutilized.
Brownfield
This law aims to clean up hazardous waste sites.
CERCLA
Persistent pollutants build up in organisms in this process.
Bioaccumulation
A spike in turbidity, nitrates, and fecal coliform is likely from this source.
This type of bacteria indicates contamination by animal or human waste.
Coliform
Reusing a T-shirt by turning it into a tote bag is an example of this.
Upcycling/Recycling
This act seeks to maintain the integrity of U.S. waters.
Clean Water Act
Acid rain is primarily caused by emissions of this pollutant.
Sulfur dioxide
A toxicologist tested four new herbicides. The LD₅₀s are:
Herbicide A: 100 mg/kg
Herbicide B: 350 mg/kg
Herbicide C: 75 mg/kg
Herbicide D: 500 mg/kg
Rank them from most to least toxic based on the LD₅₀ values.
C, A, B, D
This pollutant in high levels can cause neurological damage, especially in children.
Lead
These items are not biodegradable and may take hundreds of years to break down.
Plastics
This law helps regulate chemicals before they enter the market.
Toxic Substances Control Act
This is why fish often die during eutrophication events.
Lack of oxygen
On a dose-response curve, a steep slope means this about the chemical's effect.
Effect increases rapidly with dose
The process that removes pathogens using UV light, ozone, or chlorine.
Disinfection wastewater treatment
The process by which organic waste is broken down by microorganisms into a soil-like material.
Composting
This law mandates cradle-to-grave tracking of hazardous waste.
Resource Conservation and Recovery Act
These chemicals disrupt hormonal functions in wildlife.
Endocrine disruptors
A farmer must apply at least this much pesticide if the LD50 is 1,000 g/cm³ and they want to kill 50% of pests.
1,000 g/cm³