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Wood-drying kiln

Annual circulation patterns in a dimictic lake: stratification in the summer and complete overturn in the autumn and spring.

Vegetation profile of a temperate deciduous forest.

Energy saving lightbulb with windmills and nuclear power plant

Rising air in an unstable atmosphere

Tree with recycling sign growing out of tree

Cyclone collectors remove relatively coarse particulates from the air. Small cyclones are often installed on mobile sources.

下落するグラフ　コイン - ポイント

下落するグラフ　コイン - 円

Arrow in grass circle, artwork

グリーンの葉　CG

Earth's prebiotic and modern atmosphere

Man, woman and tree with recycling sign

Paper recycling bin

Zonation of the ocean. Note that in the littoral zone the water is at the high-tide mark.

Four main types of estuaries: A) salt wedge estuary, B) partially mixed estuary, C) vertically homogeneous estuary, D) fjord.

Blower-scavenged, two-stroke-cycle engine with uniflow scavenging, displaying both upstroke and downstroke.

Wet scrubber using a limestone slurry to remove sulfur dioxide from flue gas.

Map showing mountain ridge terrain, illustration

Vegetation profile of a savanna.

Recycling sign and office building

Globe, tree and recycling symbol

Question marks, illustration

Question marks, illustration

Question marks, illustration

Vegetation profile of a desert.

Vegetation profile of tropical mountain lands.

The circulation of nitrogen in various forms through nature, a process essential to life on Earth.

人々の矢印イメージ

ブラジル　地図　緑　アイコン

ブラジル　地図　緑　アイコン

日本　地図　緑　アイコン

日本　地図　緑　アイコン

日本　地図　緑　アイコン

日本　地図　緑　アイコン

工場の外観イラスト

工場の外観イラスト

工場の外観イラスト

工場の外観イラスト

工場の外観イラスト

工場の外観イラスト

Greenwashing, conceptual illustration

Office, files and wastepaper bin

下落するグラフ　コイン -ビットコイン

Scientific experiment lifecycle

icon

Hydraulic fracturing for shale gas

Two computer plugs and globe

Icon Cogs on white circle with a long shadow

ornament arrow

Icon bird-house on white circle with a long shadow

Maze, artwork

Family, tree and recycling sign

Mass spectrometer and data chart, illustration

Displacements in the Earth in four types of free vibrations.

Computer crash, conceptual artwork

Computer crash, conceptual artwork

A stack of books on a white background vector illustration

数字が密集する球体

数字が密集する球体

A cutaway view shows how light passes through the lenses and prisms of binoculars.

Types of faulting in tectonic earthquakes.

The two sensory organs of balance: the cristae of the semicircular ducts and the maculae of the utricle and saccule.

The brewing process, which turns barley and hops into the alcoholic beverage of beer.

Sheets of paper with recycling symbol, illustration

Sheets of paper with recycling symbol, illustration

Stratigraphic column, illustration

Stratigraphic column, illustration

Vegetation profile of a boreal forest. The tree layer consists mainly of conifers, and mosses are the predominant ground cover.

Truck and recycling sign

人々の住宅イメージ

Recycling sign with sun, tree, and clouds

Channelled scablands formation, illustration

Ice dam failure, illustration

木のそばに集まる人々

Hands with power station chimneys and wind turbines in leaf shape

Robot lamenting Earth, conceptual image

Robot lamenting Earth, conceptual image

Wall of question marks, illustration

カラフルな矢印と地球儀

ハートイメージ

thermometer icon

Baghouse employing an array of fabric bags for filtering the airstream.

ウェディング

Vegetation profile of a grassland.

EV 電気自動車

EV 電気自動車

積み重なった一万円札の札束　二束

積み重なった2つの札束　

environmental set of logos with drop shadow and leaf

Set of grungy eco stamps, vector illustration

collection of twelve buttons with bubble fluid fills

ヨーロッパ　地図　緑　アイコン

ヨーロッパ　地図　緑　アイコン

リオデジャネイロ　地図　緑　アイコン

リオデジャネイロ　地図　緑　アイコン

みんなで手を繋いで地球を囲む

地球の形の果実

地球

地球

地球アイコン

Tap water, illustration

Tap water, illustration

Tap water, illustration

Tap water, illustration

Greenwashing, conceptual illustration

Earth path, conceptual illustration

Carbon capture technology, illustration

二酸化炭素を排出する工場のイラスト

有毒ガスを排出する工場のイラスト

Fuel pump connected to leaf

Bulldozer moving garbage dump

Vector silhouettes of gears, wheels, and rims.

Passenger aircraft air circulation system

Aircraft toilet system, illustration

Aircraft flight recorder, illustration

入退室のアイコンのセット

Illustration of a modern silver metal thermostat with black background

ゴミを荒らすカラス

made in nature label, vector illustration

成長するグラフ　コイン - ドル

成長するグラフ　コイン -ポイント

成長するグラフ　コイン -円

下落するグラフ　コイン - ドル

下落するグラフ　コイン - ユーロ

成長するグラフ　コイン - ビットコイン

成長するグラフ　コイン - ユーロ

Stacked crushed cars being recycled

Sound waves human ear, illustration

Insect contracting muscles to move wings down, illustration

カラフルな矢印と地球儀

青系矢印と地球儀

Fuel pump and grass in the gas station

People stacking boxes, illustration

高く積まれた矢印のサイコロ

シンプルな地図とマップピンのイラスト

シンプルな地図とマップピンのイラスト

イラストイメージ

Icon Sewing Machine on white circle with a long shadow

Icon Sewing Machine on white circle with a long shadow

bolt icon

bolt icon

Pliers Icon

Chinese traditional currency Yuanbao

Books, artwork

洗濯カゴ

Representation of a girl sitting stack of coins

自動車事故（物損事故、人身事故、自動車同士）

自動車事故（物損事故、人身事故、自動車同士）

自動車同士の車両事故、自動車と標識への対物事故

Music in a notebook

Printer icon on white circle with a long shadow

Icon phone on white circle with a long shadow

monitor icon

作業員の上半身イラスト

Four flower trees in a row

Human Heart,

The normal, or perpendicular, at each point of a surface defines the corresponding tangent plane, and vice versa.

Each point on the Riemann sphere corresponds to a point on the plane. The ray tangent to the north pole corresponds to infinity.

Double refraction showing two rays emerging when a single light ray strikes a calcite crystal at a right angle to one face.

Wind turbine

Tidal power

Broken USA, conceptual illustration

Climate change, conceptual illustration

Apartment building with tree on leaf

音符が密集する球体

白地で並行する３色の矢印

Truck running on an arrow shaped road

isolated 3D green recycle symbol - vector illustration

Brown striped envelope with shadow and single piece of paper

White envelopes with shadow with letter and page curl

Set of four business icons with envelopes and drop shadow

CG,スティルライフ,イラスト

Office building with recycling signs and trees

Building with tree shape shadow

ジャガイモ

River system, illustration

Rock formation and erosion cycle, illustration

Electric car, cutaway illustration

Electric car, cutaway illustration

Electric car, cutaway illustration

Electric car, cutaway illustration

Electric car, cutaway illustration

同期したスマートデバイスとログイン画面

Falling bullets, illustration

Entropy, conceptual illustration

Digital composite backgrounds

矢印のアイコンのセット

矢印のアイコンのセット

矢印のアイコンのセット

矢印のアイコンのセット

Coriolis force

Bohr atomic model

Electron shell

Basic components of an electrochemical cell.

A tokamak is a toroidal magnetic confinement system used as a method of achieving fusion energy.

The Hardy-Weinberg Law applied to two alleles.

Apollo mission profile for a lunar landing and return, outlining the various stages along the mission.

If a saddlepoint does not exist for a payoff matrix, a probabilistic strategy is optimal to maximize expected (average) rewards.

The first reduction for an n-person voting game theory, illustrating the strategies least suitable for each participant.